, a 23-year-old working mother, was a strong-willed Ridley High grad with a supportive family, big plans for the future and the drive to make them a reality.
She'd just been accepted to Temple University and wanted to become a radio broadcaster.
Her ex-boyfriend Aaron Michael
, the troubled son of a longtime Chester cop, had other things in mind.
Infuriated that Arrington had filed a restraining order against him
, Michael, 29, grabbed his father's .40-caliber handgun - believed to be his service pistol - Monday night and ambushed Arrington
in Ridley Township when she arrived at the babysitter's house to pick up their 2-year-old son, police said.
He opened fire before the babysitter opened the door.
It wasn't the first life that Michael has taken
, Delaware County District Attorney G. Michael Green said yesterday afternoon.
In a phone confession that he made to two friends after killing Arrington, Michael admitted to slaying two sons he had fathered with other women
, Green said.
The causes of deaths of 4-year-old Lamar Patrick
on Sept. 29, 2005, and of 4-month-old Alijah Townes
on July 21, 2007, had been ruled "undetermined" by the county Medical Examiner's Office. But both boys' mothers were "extremely suspicious"
of the circumstances of their deaths, Green said.
Michael had been interviewed in relation to both cases and had maintained his innocence, Green said.
Michael confessed at about midnight Monday while holed up in his dad's house, where he had gone after shooting Arrington.
Moments later, he was shot by a Chester police officer and was pronounced dead
at 12:36 a.m. yesterday. Green said that Michael refused to drop his gun when police asked.
Michael had been living with his father, John Michael, a 15-year veteran of the force. He was in Florida at the time.
"That telephone conversation took place literally minutes before the exchange with Chester police that resulted in his death," Green said of the confession. "Up until this moment, this is the first firm information we have suggesting that his hand had any part to do with the death of Lamar Patrick and Alijah Townes
Patrick died overnight in what "appeared to be" a possible choking, Green said. Townes tested positive for meningitis, but that was not determined to have killed him, Green said. Both mothers have been notified of Michael's admission.
Thornton-Arrington said her daughter had broken up with Michael weeks ago and filed a protection-from-abuse order this month. He responded by threatening to kill her entire family and harassing her
, she said.
"While still conscious, in a dying declaration, Andrea was able to tell the police officers that Aaron Michael shot her
and that she had a protection-from-abuse petition and order entered against him," Green said.