That is the problem with heroin it is a bit moorish 

Colin Kroll, the co-founder of HQ Trivia and Vine, died of an accidental overdose, the city's medical examiner has announced.

Kroll dead

Colin Kroll, the co-founder and CEO of the HQ Trivia app and co-founder of Vine, has been found dead of a drug overdose in his apartment. He was 35.

As it considers acquisition itself

A week and a half ago, Twitter announced that it would be shutting down its short-form video compilation service Vine, keeping the website and video archive available but disabling mobile app functionality for its users over the next couple months.