Prosecutors are seeking another opinion about whether a 21-year-old Rincon Valley man was insane when he stabbed his father to death in their home.

Two court-appointed doctors have already found that Houston

Herczog was suffering from a form of schizophrenia in 2011 when he killed Mark Herczog, 63. He has pleaded not guilty by reason of insanity.

But prosecutor Bob Waner on Friday asked Judge Dana Simonds to allow a third psychologist, Dr. James Missett, to evaluate Herczog.

His findings could be used at Herczog's trial, set to begin April 5. Sim-onds is expected to rule on the matter at a

March 25 hearing.

Herczog's lawyer, Karen Silver, is opposing the additional evaluation. She said all evidence so far points to a conclusion that Herczog was insane. She said Herczog believed his father was possessed by an evil spirit.

Also, family members have urged Herczog be committed to a mental hospital rather than prison.