WORCESTER, Mass. — 25 Investigates has learned that the man accused of fatally stabbing his ex-girlfriend inside a Worcester restaurant may have been tracking her location before her murder.
Amanda Dabrowski was trying something new, and joined a book club that met at O'Connor's restaurant in Worcester.
But it was there, on July 3, that investigators say her ex-boyfriend, Carlos Asencio, found her and killed her.
Sources told 25 Investigators that Asencio may have been tracking her whereabouts in the days leading up to her murder.
People familiar with the investigation confirm a cellphone was found attached to her car's rear bumper with duct tape.
It's unclear when or how the phone was placed there.
But sources say it could have helped Asencio track down Dabrowski's location on the night of the murder.
Investigators say Asencio stabbed Dabrowski 15 to 20 times in front of diners at the busy restaurant.
Her murder came less than three months after Asencio, according to court records, broke into Dabrowski's home in Ayer in the early morning hours of Easter Sunday.
Records say he attacked her with a stun gun, a knife and tried to strangle her.
They dated only briefly.
Hours later, investigators say Asencio fled the country to Canada and then flew to Mexico.
Court records indicate Dabrowski filed a restraining order against Asencio in early May. It expired June 3.
The Middlesex District Attorney's office and Ayer Police say they notified U.S. Border Patrol and U.S. Marshals that a criminal warrant was issued for Asencio following the attack back in April.
How and when he returned to the United States remain a mystery.