QUINCY – A Massachusetts teenager prosecutors say killed his mother, older sister and his mother's boyfriend in their Weymouth home was sent to a hospital for a psychiatric evaluation after his arraignment Monday.



Donald Rudolph, 18, was held without bail after not guilty pleas to charges including three counts of murder were entered on his behalf in Quincy District Court.



Prosecutors disclosed at the arraignment that the victims had been either stabbed or beaten to death with a hammer, which was recovered at the scene.



Police who responded to the family home on Thursday night after a neighbor reported suspicious activity found the bodies of Frederick Medina, 52; Paula Rudolph, 50; and Caylin Rudolph, 24.



Medina was found in the living room of the house stabbed several times, and had his throat cut, prosecutors said. A beanbag doll was stuffed in his mouth.



Caylin Rudolph was stabbed multiple times and beaten, while Paula Rudolph was beaten. The women were found in the garage.



"There was an extreme amount of stab wounds to Mr. Medina's body as well as Caylin Rudolph's body," prosecutor Craig Kowalski said.



Donald Rudolph did not live at the home.



John Darrell, Donald Rudolph's lawyer, said his client has no recollection of what happened in the house.



A court clinician who examined him said it does not appear as if Rudolph understands why he is in court.



He is due back in court on Dec. 2.