On Tuesday, Los Angeles Superior Court Judge Victor Wright dismissed charges against Justin Marquis Scott, 19, of Compton, citing new evidence.
Scott was arrested on Oct. 8 following a shooting that left two women dead and a man injured at an apartment complex in Inglewood.
The two female victims were identified as 18-year-old Crystallyn Nguyen and 64-year-old Dora Lee Dawson. It was later determined that Scott was Nguyen's ex-boyfriend. The 64-year-old was the grandmother of Nguyen's new boyfriend.
Defense attorney Juliette Robinson said surveillance videos proved her client was in Compton and not in Inglewood during the time of the shooting.
Security camera video showed Scott was at a Smoke 4 Less store in Compton at the time of the shooting deaths. She also said three other tapes showed he was at his mother's home and two other locations in Compton around the time of the crime.
"Every place that my client told me he was at on that day, we went to that place and there was a surveillance video," said Robinson.
Scott was reunited with his mother, Netta Williams, outside the courthouse.
"You're supposed to be innocent until proven guilty," said Williams. "It was just the opposite. My life is turned upside down. Our life is turned upside down. No one should ever have to experience this, no one."
Scott could have faced the death penalty if convicted.
The murders remain under investigation.
Anyone with information on the shooting was urged to contact the Inglewood Police Department at (888) 41-CRIME.
The Associated Press contributed to this report.