AUGUSTA – A man with a history of schizophrenia who was judged not criminally responsible for the 2002 murder of a Portland cabdriver will be permitted to leave a state psychiatric hospital without supervision for up to an hour at a time.

A judge also agreed Thursday to allow Derek Finn-Wilhelmsen, 25, to visit his parents at their Portland home but said he otherwise must remain out of Cumberland and Somerset counties.

Finn-Wilhelmsen, a Portland bus station worker, was charged with shooting cabdriver Nunzi Mancini seven times with a .22-caliber pistol after Mancini drove him to Pittsfield to visit his girlfriend.

Evidence at his trial showed that Finn-Wilhelmsen intended to kill his girlfriend and her baby. After Thursday’s hearing, Superior Court Justice Donald Marden said Finn-Wilhelmsen is barred from being near the woman.

After his trial, Finn-Wilhelmsen was sent to what is now the Riverview Psychiatric Center, where staff members said he has shown improvement over the past year and has taken medication that keeps his delusions at bay.

Ann LeBlanc, director of the State Forensic Service, said he has gained self-confidence and is a good worker at the state hospital, helping with landscaping and earth moving. “He’s not a danger to anyone,” she told the judge.

In a separate hearing Thursday, the state argued against a proposal for limited off-grounds times for Michael MacDonald of Masardis, who was found not criminally responsible because of mental illness for the 2004 gunshot and bludgeon slaying of his father.

Deputy Attorney General Bill Stokes said MacDonald, 30, was granted some privileges last year, and the next day was found smoking marijuana on Riverview grounds. Stokes also quoted MacDonald as telling one patient he should slit his throat and another that he should cut his wrists.