He wrote her name in blood on the wall outside her home

“They started out as friends in 2016, but then it took a turn for the worse when Jonathan Derasacosta wanted to be more than friends. He started harassing and stalking the adult female victim.

She eventually moved to San Diego to attend college and unbeknownst to her, Derasacosta followed her there and continued to stalk her on campus.

She got a restraining order and on March 30, 2019 Derasacosta was arrested by UC San Diego PD for stalking and violating a restraining order. After his release from jail, he did not stop following the victim and continuously ignored the restraining order. The victim was diligent about reporting these violations to law enforcement.

On June 3, 2019 Derasacosta was once again arrested for stalking the victim in San Diego.

In early 2020, Derasacosta was released from jail in Southern California due to the COVID pandemic. Around the same time, the victim had moved back to San Carlos to continue her studies online.

Sometime in May, 2020 Derasacosta went to the victim’s residence and used what appeared to be red substance (possibly blood) and wrote the victim’s name on the wall. The victim continued to report these scary incidents and our teams continuously investigated his disturbing behavior.

While detectives were interviewing Derasacosta they noticed he also had the victims name carved into his forearm.

On October 8, 2020 San Mateo County Sheriff’s Office detectives arrested Derasacosta and he was booked for:

PC 646.9(a) – Stalking

PC 12022.1 – Commit felony while out on bail

PC 166(A)(4) – disobey a court order

His bail is $500K.”