BALTIMORE, DEC. 26 -- Police arrested a Baltimore man today who is charged with killing his mother with an electric circular saw as she slept on Christmas Eve at their home.

Officers found Clifton Earl Williams, 30, in the bushes behind his home in the 5200 block of Ivanhoe Avenue about 5:40 a.m., city police spokeswoman Arlene Jenkins said. He is charged with first-degree murder in the death of his mother, Dessie Williams, 50. She was a hospital housekeeper.

Detectives said Clifton Williams linked several extension cords and savagely attacked his mother in her bed, leaving her in a pool of blood in a second-floor hallway.

Clifton Williams's sister, Sheila Mayor, said she left her mother asleep in the house Monday morning and went to run some errands. When she returned home she found her mother dead, she said.

"I didn't have to get up the stairs all the way to see my mother. I screamed and ran out of the house," she said.

Mayor and her other brother, Norman Williams, said Clifton Williams had been diagnosed as a paranoid-schizophrenic.

Medication kept his condition under control, they said, but he was prone to irrational behavior when he would refuse to take his pills. He had gone a long time without his medication, they said.

Mayor said her brother Clifton kept the saw in his bedroom and used it to cut wood.

"He was different from all of us," she said. "You do something one way, and he'd do the opposite."

Norman Williams added, "But we always felt he didn't have the capability of hurting anybody."

An arrest warrant charges Clifton Williams with first-degree murder and possession of a deadly weapon.