Given how heavily and uncritically the initial theory of a homeless/lower class person as the killer was promoted (not least of all here on HN), I think it made a lot of sense to reveal that the actual suspect now arrested worked in the tech industry and was acquainted with the victim.

Beyond that, it's nor clear to me that revealing the actual name or other personal details of the suspect serves a legitimate purpose of advancing justice or society; however, it is not out of keeping with journalistic practice in other criminal cases in California. Suspects' names get printed in newspapers for far lower profile crimes all the time.