Alexander Charles Teves, 24, was one of 12 people killed on July 20, 2012, in the mass shooting at the Century 16 movie theater in Aurora, Colorado, during a midnight screening of The Dark Knight Rises. Reports say a single bullet from an AR-15 struck Teves and killed him instantly as he shielded his girlfriend, Amanda Lindgren, from the barrage of gunfire; Lindgren survived.

Known as Alex, he had recently earned a master’s degree in psychology from the University of Denver and was pursuing a degree in physical therapy. Friends and family remembered him as loyal, compassionate, and funny, and he had worked counseling and mentoring troubled youth.

James Eagan Holmes entered the theater in tactical gear, deployed tear gas grenades, and opened fire with multiple firearms, injuring about 70 others before being arrested at the scene. If anyone knew Alexander or was at that screening and has information to share, please come forward.