AUGUSTA – A lawyer for a Monmouth man who is accused of murdering his mother asked a judge Friday to suppress statements his client made to police during the their investigation.

Attorney James Billings wants Justice Michaela Murphy to rule that Kenneth McDonald’s statements cannot be used in his trial, set for Aug. 30 in Kennebec County Superior Court.

Murphy heard testimony Friday on Billings’ motion. Law enforcement officers said they talked to McDonald on Aug. 25, 2009, a day after his mother’s body was found in the home they shared.

Janice McDonald, 80, was stabbed and beaten.

McDonald, 43, repeatedly denied killing his mother.