Cathedral Catholic High School Teacher Dies in Shooting


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Photo by Diocese of San Diego

San Diego Police are on the lookout for the killer responsible for the death of a local high school teacher. The victim was identified as 37-year-old Mario Fierro, a teacher at Cathedral Catholic High School. He was found dead after a shooting which took place 7:10 am, February 1st on the 4500 block of Kansas Street near Monroe Avenue, in North Park San Diego, according to Officer Dino Delimitros.


When authorities arrived at the scene, they reported finding Fierro unresponsive by an apparent gunshot injury on the sidewalk. Officers attempted to perform CPR until San Diego Fire-Rescue personnel arrived. Fierro was pronounced dead at the scene.


Detectives have received information that Fierro may have possibly been involved in an altercation with a Hispanic male in his 40’s who was wearing jeans and a zip up top. The suspect was reportedly last seen northbound on Kansas Street in a small, older vehicle, according to CBS News 8 San Diego.


Cathedral Catholic High School has made clear that there will be additional security personnel on campus in lieu of the shooting.


Anyone with information is urged to call the Homicide Unit at 619-531-2293 or Crime Stoppers at 888-580-8477.


Update: Since the original posting of this story, Fierro’s suspected killer has been arrested for murder as of February 2, 2021. The person in question is Jesse Alvarez 30, an ex boyfriend of Fierro’s fiancee.

Prior to Alvarez’ arrest, Fierro’s fiancee request for protection was denied. The judge deeming him “credible” at the time.

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