Steven Jones, an Arizona college student charged with murder, is taking the stand in his own defense. The then-freshman at Northern Arizona University shot four other students after an off-campus party on October 9, 2015, killing one of them. Jones claims that he acted in self-defense after being chased during a brawl. Prosecutors allege that Jones was merely sucker-punched by drunken fraternity members and that the shooting was not justified.

Colin Brough died in the attack, and Nick Piring, Nick Prato, and Kyle Zientek were injured. Jones is facing one charge of first-degree premeditated murder and six charges of aggravated assault.

All three surviving victims have testified. Jones contends that the shooting was justified because he did it in self-defense. He is the first witness that the defense called after the prosecution rested their case this morning.

Aaron Keller contributed to this report.