Shapiro, co-founder of Sound Talent Group, and two employees were among those killed in the San Diego plane crash.

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.

Pierce the Veil are a group Shapiro worked especially close with as their agent, manager and friend. He attended the band's sold-out show this past Tuesday at New York City's Madison Square Garden, and flew out of New Jersey's Teterboro Airport the following night to head back home.