Pima County sheriff's deputies working off-duty at a north-side store heard gunshots behind the store Saturday and found a 15-year-old who had been fatally shot, police said Monday.
The teen, Carlos Cadena, was taken to a hospital where he was pronounced dead shortly after arriving, the Tucson Police Department said in a news release, also giving the following account:
Homicide detectives learned that a group of adults and juveniles got into a physical fight behind the store, a Walmart in the 400 block of East Wetmore Road, and gunshots were fired.
Several witnesses to the shooting left the area before police arrived.
"Detectives are actively working to determine a motive and to identify a suspect as details are extremely limited at this time," police said.
Detectives are asking anyone with information or who was at the scene to call 88-CRIME; callers may remain anonymous.
Tucson has seen five homicides in 2023, one more than in 2022 at this time, police said.