A hearing to determine if a man accused of attacking 12 people in a 2016 crime spree is mentally fit to stand trial is expected to continue into next week.
Homicide investigators say that in some incidents, the attacker used a railroad spike to impale his victims.
Jon David Guerrero, 39, faces four murder charges, three attempted or premeditated murder charges, two arson charges and five assault charges in attacks on several homeless people and other San Diego residents, some of whom were killed with railroad spikes.
In July 2017, Guerrero was found not competent to stand trial and sent to Patton State Hospital for treatment.
He has been in custody since July 15, 2016, accused of attacking a dozen people throughout San Diego in a spree that began on July 3, 2016.