DES MOINES, Iowa (AP) — A Polk County jury has convicted a man of murder in the fatal shooting of his girlfriend in the Des Moines suburb of Johnston.

The Des Moines Register reports jurors on Tuesday deliberated less than three hours before convicting 39-year-old Abraham Roberts of first-degree murder in the death of Agnes Yarlee, who was found April 15 in her apartment.

Prosecutors say the 34-year-old Yarlee had been shot five times as she sat on a couch following an argument with Roberts.

Defense lawyers didn't dispute that Roberts killed Yarlee but argued he'd "lost it" during an argument, then blacked out with no memory of the shooting.

Roberts was arrested at the Canadian border the day after the shooting.

First-degree murder carries a mandatory sentence of life without the possibility of parole.

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Information from: The Des Moines Register, http://www.desmoinesregister.com