According to his friends and multiple media outlets, he had been missing since Dec. 7. There was a frantic social-media-driven search for him. Police found him in his car on Tuesday. An NYPD spokesperson told Pitchfork that a preliminary investigation didn't show any "signs of criminality." (Update: His family created a website in his memory. According to his family, he died of an undiagnosed heart condition.)
Jayne had been bartending at Daddy's and Clem's in Williamsburg.
This Brooklyn Vegan post has tributes from his many peers in the music business. The above video is for the Love as Laughter track "Coconut Flakes" from 2007.