Un homme enragé? Délirant? En dépression profonde?

Un psychiatre estime que, bien qu’on n’en sait bien peu sur l’homme qui a ouvert le feu sur une foule dimanche à Las Vegas, tout semble pointer vers la maladie mentale.

Écoutez ci-dessus l’entrevue complète avec le psychiatre Gilles Chamberland

«C’est totalement absurde. On n’a rien de logique pour expliquer ça; pas d’antécédents judiciaires, les proches ne semblent pas l’avoir vu venir. À ce moment-là, ça oriente vers de la maladie», estime le médecin psychiatre et directeur des services professionnels à l’Institut Philippe-Pinel, Gilles Chamberland.

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  LAS VEGAS, NV - OCTOBER 01: A body appears to lie under a sheet as police and rescue personnel gather at the intersection of Las Vegas Boulevard and Tropicana Ave on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People take cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People tend to the wounded outside the festival ground after an apparent shooting on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01 People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People run from the Route 91 Harvest country music festival after apparent gun fire was hear on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A body lies under a sheet as fire and rescue personnel gather at the intersection of Las Vegas Boulevard and Tropicana Ave. after a mass shooting at a country music festival nearby on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People run for cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: (EDITORS NOTE: Image contains graphic content.) A person lies on the ground covered with blood at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01 People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01 People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 02: Police and rescue personnel gather at the intersection of Las Vegas Boulevard and Tropicana Ave. after a mass shooting at a country music festival nearby on October 2, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 50 people dead and more than 200 injured. Police have confirmed that one suspect, Stephen Paddock, has been shot and killed. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People scramble for shelter at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: Las Vegas Metropolitan Police Department officers stand near an ambulance as medical personnel treat a person in the parking lot of the Hooters Casino Hotel after a mass shooting at a country music festival nearby on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 02: A Las Vegas Metropolitan Police Department officer stands in the intersection of Las Vegas Boulevard and Tropicana Ave. after a mass shooting at a country music festival nearby on October 2, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 02: Las Vegas police patrol along the streets outside the the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: Las Vegas police stand guard along the streets outside the festival grounds of the Route 91 Harvest on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 02: A Las Vegas Metropolitan Police officer stands at the intersection of Las Vegas Boulevard and Tropicana Ave. after a mass shooting at a country music festival on October 2, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A Las Vegas police officer informs people to stay in place after shots were fired near Route 91 Harvest Country Music Festival on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A man lays on top of a woman as others flee the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  TOPSHOT - LAS VEGAS, NV - OCTOBER 01: People scramble for shelter at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. David Becker/Getty Images/AFP / AFP PHOTO / GETTY IMAGES NORTH AMERICA / David Becker
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  LAS VEGAS, NV - OCTOBER 01: A cowboy hat lays in the street after shots were fired near a country music festival on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A man stands outside the the Route 91 Harvest country music festival grounds after an active shooter was reported on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A crowd of people at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01 People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: People tend to the wounded outside the festival ground after an apparent shooting on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: (EDITORS NOTE: Image contains graphic content.) People carry a peson at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: (EDITORS NOTE: Image contains graphic content.) People carry a person at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: (EDITORS NOTE: Image contains graphic content.) A person lies on the ground at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: (EDITORS NOTE: Image contains graphic content.) A person lies on the ground at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 02: An injured person is tended to in the intersection of Tropicana Ave. and Las Vegas Boulevard after a mass shooting at a country music festival nearby on October 2, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, killing over 20 people. Police have confirmed that one suspect has been shot dead. The investigation is ongoing. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: Las Vegas police stand guard along the streets outside the the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  EDITORS NOTE: Graphic content / Police form a perimeter around the road leading to the Mandalay Hotel (background) after a gunman killed at least 50 people and wounded more than 200 others when he opened fire on a country music concert in Las Vegas, Nevada on October 2, 2017. Police said the gunman, a 64-year-old local resident named as Stephen Paddock, had been killed after a SWAT team responded to reports of multiple gunfire from the 32nd floor of the Mandalay Bay, a hotel-casino next to the concert venue. / AFP PHOTO / Mark RALSTON
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  LAS VEGAS, NV - OCTOBER 01: A man in a wheelchair is taken away from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A person takes cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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  LAS VEGAS, NV - OCTOBER 01: A person takes cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. David Becker/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

Bien entendu, le spécialiste n’a pas rencontré Stephen Craig Paddock avant son passage à l’acte. Il base donc son analyse sur les quelques informations qui ont filtré sur ce riche retraité de 64 ans.

Maladie neurologique?

Selon le psychiatre, il est possible qu’une tumeur au cerveau soit à l’origine du débalancement de l’individu; on a trouvé chez des tueurs de masse une explication neurologique à leurs gestes. Toutefois, M. Chamberland penche pour l’option de la maladie psychiatrique, que ce soit un trouble délirant ou une dépression profonde, entre autres, avec énormément de colère.

«Un des éléments principaux, c’est non seulement cette violence qu’il a faite sur des gens, mais le fait qu’il se soit suicidé après, qu’il était prêt à sacrifier sa vie faire ça, on est vraiment dans le domaine de la maladie.»

Les changements dans les comportements de l’homme seraient survenus dans les derniers jours. Sa compagne était en voyage au moment du carnage.

«Ça exclut un peu le glissement vers [la radicalisation], analyse le Dr Chamberland. Ça serait surprenant que quelqu’un glisse au point de devenir fanatique à ce point-là sans que son entourage s’en rende compte.»

Un geste planifié

Quoi qu’il en soit, les gestes de Paddock étaient clairement planifiés. Il semble clair que ce n’était pas un impulsif. Certaines maladies mentales n’affectent pas l’intelligence, rappelle le psychiatre.

«On va mettre toute notre intelligence au service de ce délire ou de ce désir de vengeance ou de faire du mal», soulève-t-il.

La préparation du tireur a duré pendant plusieurs jours, suggèrent les premiers éléments de l’enquête. Est-il possible qu’il n’ait pas eu de contact avec la réalité pendant toute cette période?

«Il y avait peut-être des hallucinations qui soutenaient ce délire-là. Ça peut être une dépression profonde d’un individu qui voulait se suicider et qui s’est dit qu’il allait se venger contre la société avant. Ça prend énormément de rage pour faire quelque chose comme ça et se suicider après», remarque le Dr Chamberland.

Et s’il n’a pas laissé de notes ou de message, il est possible qu’on ne sache jamais ce qui l’a poussé à briser autant de vies.

«Si c’est quelqu’un qui avait une cause à défendre, habituellement ces gens-là en profitent pour mettre de l’avant cette cause», souligne le spécialiste.