Luigi Nicholas Mangione, the murder suspect detained in connection with the deadly UnitedHealthcare CEO shooting, previously worked for the California-based digital automotive marketplace TrueCar, Inc., until last year, KCRA 3 has confirmed. He also appeared to have worked at Stanford University as a head counselor for a summer program at Stanford University during the summer of 2019.NYPD Chief of Detectives Joseph Kenny on Monday first identified Mangione, 26, as a “strong person of interest” in the Manhattan ambush shooting of UnitedHealthcare CEO Brian Thompson last week. He was later identified as the suspect in the shooting. Mangione was arrested on a firearms charge and is fighting extradition to New York. Kenny said Mangione was born and raised in Maryland, had ties to San Francisco and a last known address in Honolulu, Hawaii. | MORE | Luigi Mangione: From privileged upbringing to murder suspectAn apparent LinkedIn page for Luigi Mangione has biographical details that line up with that description. According to the page, Mangione was the valedictorian of the Gilman School when he graduated from the private Baltimore school in 2016. WBAL in Baltimore confirmed that Mangione was an alumnus and valedictorian of the school. WBAL also reported that he went on to earn undergraduate and graduate degrees from the University of Pennsylvania. He is also the cousin of a Baltimore County delegate. Mangione's LinkedIn page said that he worked part-time as a head counselor teaching about artificial intelligence to “gifted high school students” at Stanford University during the summer of 2019. That included leading a seven-member residential staff “in creating an inclusive, fun and stimulating residential community,” according to the social media page. According to the program’s website, the pre-collegiate studies program hosts students from across the world. “We can confirm that a person by the name of Luigi Mangione was employed as a head counselor under the Stanford Pre-Collegiate Studies program between May and September of 2019,” Stanford spokesperson Dee Mostofi told KCRA 3 in a statement. The same LinkedIn page said Mangione has worked at Santa Monica-based TrueCar, Inc. for the past four years as a data engineer where he took on greater responsibilities. A TrueCar representative said the company generally doesn't comment on personnel matters but that it could confirm Mangione "has not been an employee of our company since 2023." TrueCar describes itself as the "first and only online marketplace for new, used and certified pre-owned vehicles." Representatives for the NYPD told KCRA 3 they could not confirm details about Mangione's ties to California beyond what has already been announced, or the authenticity of the LinkedIn page at this time. See more coverage of top California stories here | Download our app | Subscribe to our morning newsletter