Meza was killed near the intersection of 6th and Mateo streets just after 5 p.m. after officers responded to a report of a man firing shots in the air.
Carrie Kravetz took a picture of the suspect, about 15 feet away, seconds before police opened fire.
Meza was pronounced dead at the scene. No officers were injured.
It's unknown whether the suspect was under the influence of drugs or alcohol, or what set him off.
The investigation is ongoing. Anyone with further information was urged to contact the Los Angeles Police Department.