WOBURN, Mass. -- The deaths of a Woburn mother and her 12-year-old daughter were ruled a double homicide, officials announced Thursday.

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Jack Harper Reports On Murders

NewsCenter 5's Jack Harper reported that the bodies of Joanne Presti, 34, and her daughter, Alyssa Presti, were found inside the family's Totman Drive home Wednesday night.

"The cause of death was blunt trauma, blunt force trauma to her head, as well as multiple stab wounds," Middlesex District Attorney Martha Coakley said.

Joanne Presti was found downstairs. Upstairs, her daughter was found stabbed to death, according to investigators. Officials believe the killings happened either late Sunday or early Monday. A 2-year-old boy, Sean, was found unharmed in his crib. He was taken to a hospital and was in good condition.

"Police and crime scene investigators were able to obtain and recover what we believe were possible weapons from the house. I stress possible because although they could have been used for both of the homicides, at this time, we do not have positive evidence yet that any of them were," Coakley said.

Former Boston Bruin John Carter, Alyssa's father, has been interviewed by investigators, along with Presti's former husband and father of Presti's 2-year-old son, Thomas Pollack.

"I will say that everyone we've spoken with to date has been cooperative. We have no reason to label anyone as suspects, but we have not ruled anybody out at this time," Coakley said.

Presti took out a restraining order against Pollack on Sept. 26, 2001.

In the restraining order, Presti said Pollack had tried to choke her in front of her then-10-year-old daughter, then pulled the wires out of her phones. She said he threatened to burn her vehicle and take her son away. She also claimed he said he would plant drugs at her house if she tried to leave him.

"No individual has been ruled in or ruled at this time. I stress that the investigation is open ended," said Coakley.

Coakley tried to calm other Woburn residents and said that investigators are moving in certain directions.

"Although we certainly urge folks to be cautious in Woburn and everywhere about their personal safety, we urge them to continue to do that. We do not, at this time, believe that these attacks were random," Coakley said.

Flags flew at half-staff at the Joyce Middle School school, where Alyssa was in seventh grade.

"Alyssa was a very conscientious, quiet girl. Teachers would tell you that she was a pleasure to have in class. It was a shock, to say the least, to hear of her death," Superintendent Carl Batchelder said.

The deaths shocked neighbors, who said that there was no indication there were problems in the home.

"They got along well. They were a loving family. It is just a complete shock," neighbor Joanne Pacheco said. "She was a great mother, great person. The kids loved her. She loved those kids."

Autopsies on the victims are scheduled for Friday. Department of Social Services officials said that their office has a minor history with the family that dates back to 1997.

Counselors will be on hand at Alyssa's school to help her classmates.