Joshua Prince Freeman

Joshua Prince Freeman, 21, was being held in lieu of $750,000 bail at the Harford County Detention Center. (Handout photo / October 28, 2009)

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State police have made a third arrest in the carjacking of a Harford County woman this week. Lamont Harrison Jr., 19, was arrested Wednesday near his home on Melwood Court in Edgewood and charged with carjacking, armed robbery, assault, kidnapping and theft. His $1 million bond was revoked Thursday, and he remains in the Harford County Detention Center.

Joshua Prince Freeman, 19, of Edgewood and Roberta Antonaccio, 17, of Joppa face the same felony charges in connection with the incident, which began late Monday in Edgewood. Arrested Tuesday, they also have had their bonds revoked and are being held at the detention center.

Investigators said Antonaccio, who is charged as an adult, planned the crime.

According to police, Kara Smithson, 20, of Pylesville was seated in her parked Chevrolet Cobalt about 10 p.m. Monday. She was talking with Antonaccio when Freeman and Harrison forced their way into the vehicle, police said. They struck Smithson several times, threatened her with a knife and a handgun and tried to extort ransom money from her parents, before forcing her from the car on Philadelphia Road in Joppa, police said. Police found the burned-out car on the grounds of a Bel Air elementary school later that night.