PORTLAND, Ore. (AP) — The Oregon Supreme Court has overturned the murder conviction of a Lane County man, ruling police wrongfully interrogated him after his arrest and those statements shouldn't have been admissible at trial.

Robert Darnell Boyd was sentenced to life in prison in 2012 after a jury convicted of him fatally beating his girlfriend on a Springfield sidewalk. Witnesses saw Boyd running from the scene and police found him with the woman's blood on his hands, shoes and pants.

At the police station, he expressed disbelief the woman was dead and asked for a lawyer.

Hours later, a sergeant asked Boyd questions the high court believed shouldn't have been asked because they were likely to elicit an incriminating response. Boyd became agitated, asked to speak with a detective and acknowledged an altercation.

Chief Lane County Deputy District Attorney Erik Hasselman said he's disappointed by Thursday's ruling and hopes the state will appeal to the U.S. Supreme Court. He says Boyd will be retried, if necessary.