HQ Trivia and Vine cofounder Colin Kroll dead at 34 (updated)

Colin Kroll, the cofounder of video looping app Vine and high-flying trivia game HQ Trivia, has died at the age of 34.

An official with the NYPD’s public information office confirmed that a female 911 caller asked for a welfare check, and Kroll was pronounced dead at 12:18 a.m. Eastern. Kroll’s death is being investigated as a possible narcotics overdose.