A man who once pleaded guilty to attempted murder was in custody Sunday after an Oregon mental health worker was stabbed to death while visiting him in St. Helens, authorities said.

Brent Redd, a mental health services client, called police at about 8 a.m. Sunday to report that Columbia Community Mental Health worker Jennifer Warren had been stabbed, Police Chief Steve Salle said.

Warren died and the 30-year-old Redd was hospitalized with injuries, but details of his wounds weren't immediately released.

Redd has been under the jurisdiction of the Oregon Psychiatric Security Review Board after he pleaded guilty except for insanity in 2007 for attempted murder of a family member.

The Oregonian reported that Redd was sentenced to the Oregon State Hospital for 20 years, but was given conditional release in September 2010. At that time, he began receiving local community treatment and remained under the board's care.

The stabbing reportedly occurred as Warren was conducting a scheduled visit with Redd, the review board and mental health organization said in a joint statement.

It said Warren's death was the first time in 34 years that any client under the Psychiatric Security Review Board's jurisdiction has been accused of "a violent act of this nature."

Officials said there are currently 615 people under the Psychiatric Security Review Board's jurisdiction, and 415 of those are under conditional release within the community. Since 1978, the Psychiatric Security Review Board has overseen more than 1,400 people who have been found guilt except for insanity "with a recidivism rate of 2 percent," the statement said.

The paper says no charges had been filed against Redd as of 8 p.m.

Warren had worked for Columbia Community Mental Health for 10 years.


Information from: The Oregonian, http://www.oregonlive.com