--- description: 21-year-old Zachary Penton was arrested in Gilbert, Arizona for shooting and killing his roommate, only two days after tweeting a threat title: Man Arrested for Killing His Roommate Tweeting About Murder image: https://static.time.com/v3/assets/bltea6093859af6183b/blt3bcea473f8dfc38c/6988a33af887dc5f41e9725f/zachary-penton-mugshot.jpg?branch=production&width=1080&quality=75&auto=webp&crop=16:9 ---  * [U.S.](/section/us/) ## U.S. Update your preferences in [Account Settings](/account/preferences/) Close # Man Arrested for Killing His Roommate After Threatening to Murder Him on Twitter by [Daniel White](/author/daniel-white/) ## Daniel White Update your preferences in [Account Settings](/account/preferences/) Close Aug 22, 2016 8:55 PM CUT  Zachary Penton Zachary PentonMaricopa County Jail by [Daniel White](/author/daniel-white/) ## Daniel White Update your preferences in [Account Settings](/account/preferences/) Close Aug 22, 2016 8:55 PM CUT Police [arrested a man](http://www.abc15.com/news/region-southeast-valley/gilbert/gilbert-police-one-roommate-shoots-another-after-fight "undefined") for killing his one of his roommate just days after he discussed the urge to “viciously murder” them on Twitter. Police in Gilbert, Ariz. say Zachary Penton, 21, called them Sunday and confessed to shooting his roommate Daniel Garofalo, 41, after the two had some sort of argument, according to ABC 15. Penton was taken into custody and Garofalo was pronounced dead on the scene. An account under Penton’s name discussed murdering his roommates. > [](https://twitter.com/Zac%5FPenton/status/766855751570628608) Gilbert police say they “are looking into the possibility” of confirming that the account belongs to Penton, according to ABC 15\. Penton has been charged with murder, but authorities are still investigating what led to the shooting. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4462073/arizona-zac-penton-shoot-roomate-tweet/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4462073/arizona-zac-penton-shoot-roomate-tweet/"},"headline":"Man Arrested for Killing His Roommate After Threatening to Murder Him on Twitter","datePublished":"2016-08-22T20:55:31.000Z","dateModified":"2026-02-23T00:08:02.022Z","description":"Only two days before, he tweeted that he might \"viciously murder\" his roomates","url":"https://time.com/4462073/arizona-zac-penton-shoot-roomate-tweet/","keywords":["Social Media","Murder","Crime","Arizona"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt3bcea473f8dfc38c/6988a33af887dc5f41e9725f/zachary-penton-mugshot.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Daniel White","jobTitle":null,"url":"https://time.com/author/daniel-white/"}],"articleSection":"U.S.","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt3bcea473f8dfc38c/6988a33af887dc5f41e9725f/zachary-penton-mugshot.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"Zachary-penton-mugshot","caption":"Zachary Penton","creditText":"Maricopa County Jail","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/us/","name":"U.S."}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/4462073/arizona-zac-penton-shoot-roomate-tweet/","name":"Man Arrested for Killing His Roommate After Threatening to Murder Him on Twitter"}}]}] ```