Stuart Lynn Dunn took an “unauthorized departure” from the facility in the city of Pomona, while he was under the supervision of the Los Angeles County Probation Department, Sheriff Department Detective Martin Rodriguez said in a statement.
The investigation into Dunn’s escape is ongoing, and a search is underway to locate him.
Dunn was arrested in 2012 after police said he followed Kunis to the gym in hopes of meeting her. He also broke into the “That ‘70s Show” actress’ home earlier that year, authorities said.
Dunn pleaded no contest to stalking Kunis in 2013 and was ordered to complete six months in a live-in rehabilitation program. He was also ordered to stay away from her and her agents, managers and assistants for 10 years.