Tributes were pouring in across social media Thursday for music agent Dave Shapiro and drummer Daniel Williams, who were both believed to be involved in the deadly plane crash in a Murphy Canyon neighborhood.

The men were among several killed in a May 22 plane crash near San Diego. Both were at Pierce the Veil's sold-out MSG show. Here's what to know.

Dave Shapiro, a groundbreaking music executive in the heavy metal and hard rock scene, has died in a San Diego plane crash. He was 42.

Shapiro, who was also a pilot, booked Pierce the Veil, Streetlight Manifesto, The Acacia Strain, Armor for Sleep, and numerous other bands.