Colin Kroll, Co-Founder of Vine and HQ Trivia, Found Dead at 35 from Apparent Overdose

© Bryan Steffy—2014 Getty Images Colin Kroll

Colin Kroll, the 35-year-old co-founder of Vine and HQ Trivia, has been found dead in his Manhattan apartment of an apparent overdose.

Police told TIME Kroll was pronounced dead at 12:18 a.m Sunday morning. A police spokesperson did not know what kind of drugs were on the scene, but said that the police investigation is ongoing. Police said that a woman, who was apparently with Kroll at the time of the overdose, called 911.

A spokesperson from HQ Trivia, a popular, phone-based trivia platform where Kroll was the CEO, did not immediately respond to a request for comment.

Throughout the course of his career, Kroll experienced the rapid success and sudden hardships typical of the tech startup world.

In 2013, Kroll launched the video app Vine with co-founders Dom Hofmann and Rus Yusupov. The app, which was known for six-second looped video clips, gained millions of users and helped to launch a generation of social media celebrities. However, the app’s success quickly fizzled out and Twitter, which had acquired it shortly before its launch, ultimately shut it down in 2016.

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SOURCE: TIME, by Tara Law