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.

Shapiro, who co-founded music agency Sound Talent Group, was a well-known and respected figure in the rock and metal scene, credited with helping many alternative bands find audiences in the mainstream. Some of his clients include major acts like Sum 41, Pierce the Veil, and The Devil Wears Prada.

Tributes have been paid from across the music industry following the tragic deaths of Dave Shapiro and Daniel Williams.

Band mourns Daniel Williams and agent Dave Shapiro after fatal jet crash near Montgomery-Gibbs Executive Airport, CA.