Crime Transgender Man with Asperger's Syndrome Whose Dog Video Went Viral Has Been Killed by Arizona Police Officers allege Kayden Clarke lunged at them with a 12-inch knife By Chris Harris Chris Harris Twitter Chris Harris has been a senior true crime reporter for PEOPLE since late 2015. An award-winning journalist who has worked for Rolling Stone and MTV News, Chris enjoys prog rock, cycling, Marvel movies, IPAs, and roller coasters. People Editorial Guidelines Published on February 7, 2016 01:00 PM Share Tweet Pin Email Photo: Kayden Clarke A 24-year-old transgender man with Asperger’s Syndrome was shot and killed in Arizona on Thursday after allegedly lunging towards police with a knife during an incident in his home, police tell PEOPLE. Det. Esteban Flores of the Mesa Police Department tells PEOPLE that officers were dispatched to the home of Kayden Clarke (born Danielle Jacobs) on Thursday after friends claimed he’d threatened suicide in emails and text messages. A video Clarke posted on YouTube last year went viral as it showed how his dog, Samson, assisted him during his struggles with Asperger’s. (The video has since been removed but versions of it were re-uploaded on YouTube.) Flores says that friends helped police enter Clarke’s home, where officers tried to make contact with him. • Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter. “The officers were in a small hallway that leads into the bedroom,” Flores explains. “The door was open and it was dark; there were no lights on.” Clarke then appeared in the bedroom doorway, brandishing a 12-inch kitchen knife, says Flores. Clarke allegedly refused to drop the knife, and instead lunged at the officers, Flores tells PEOPLE. “They fired their weapons and unfortunately, [he] went down,” Flores says. In a video posted online in December, Clarke discussed beginning gender transition therapy, expressing excitement that his insurance would cover it. The two officers, who have not been identified, are now on administrative leave, Flores confirms.