Social media shows man who stabbed S.F. hospital worker was unraveling mentally

Multiple social media accounts for Wilfredo Tortolero Arriechi, the 35-year-old man accused of stabbing a San Francisco General Hospital social worker to death in early December, show an apparent mental unraveling in the days and weeks before the killing. Tortolero Arriechi repeatedly stabbed Rangel, who died two days later. According to multiple witnesses, the deputy was not monitoring the entrance to the clinic and was not nearby when Tortolero Arriechi arrived. The day before the stabbing, on Dec. 3, Tortolero Arriechi posted several cryptic messages on Threads. By August 2015, Tortolero Arriechi had crossed the border and was living in Cucuta, Colombia.