Sparks Police arrested a man after he allegedly attacked his 88-year-old grandmother by suffocating her with a plastic bag and then beating her with a brick-like object. 37-year-old Michael Kevin O’Day was booked into the Washoe County jail on felony charges of battery with a deadly weapon with an enhancement for attacking an elderly person. Janet O’Day called police at about 9:18 p.m. Saturday to report she was being attacked by her grandson at her home near Stanford Way and P Street. Police said they arrived to find her with several wounds to her head and blood throughout the room. She was taken to a hospital for medical treatment. Police did not release her condition. O’Day was arrested in Reno.