PORTLAND, Maine (AP) — The Maine supreme court has upheld the rejection of a convicted murderer's request to participate in supervised activities away from Augusta's Riverview Psychiatric Center.

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Mark Gessner has completed his sentence for murdering Bath florist Melvin Henderson in 1994 but he remains at the psychiatric hospital because of crimes committed in prison.

A judge previously rejected his request to either be fully released or to be allowed into the community under state supervision. In its ruling, the state supreme court noted Tuesday that Gessner does not consider himself to be mentally ill and refuses medication and counseling.

Court records indicate Gessner has been diagnosed with multiple mental illnesses including reactive psychosis, depression with psychotic features and schizophrenia.