Muhammad Youssef Abdulazeez, the 24-year-old gunman who today killed four U.S. Marines during a shooting spree in Tennessee, is pictured above in photos taken following his 2012 graduation from the University of Tennessee at Chattanooga.

The images were uploaded to the Facebook page of Abdulazeez’s mother Rasmia.

Another photo from Rasmia’s page (seen below) shows her and her husband seated next to each other with their son standing in the background.

Abdulazeez was shot to death today, though investigators have not revealed whether he was gunned down by law enforcement personnel or whether he took his own life after the attacks on a pair of military facilities in Chattanooga.

A federal prosecutor called the shootings “an act of domestic terrorism."

As seen below, in his high school yearbook, Abdulazeez included a quote attributed to Javed “Hijabman” Memon, a blogger who says that he started a web site to chronicle “my struggles as a first generation American Muslim of South Asian descent.” The quote--“My name causes national security alerts. What does yours do?”--has also appeared on t-shirts sold by “Hijabman.”