By Steve Beck

EAST FALLOWFIELD TOWNSHIP, Pa. (CBS) — A Chester County man has been charged in the “execution” murder of his long-time girlfriend.

Gregory Twyman, 44, has been charged in the shooting death of 37-year-old Jamica Woods.

The shooting happened at about 12 p.m. Tuesday inside a home the couple shared on Rokeby Road in East Fallowfield Township, Pa.

“This was a premeditated and cruel murder. This was not an argument, this was an execution,” Chester County District Attorney Tom Hogan said.

According to investigators, Twyman called 911 and told them that he had just shot his girlfriend with a shotgun.

When officers arrived, they found the suspect on the porch smoking a cigarette. He was then taken into police custody.

Officers went inside the home and found Woods’ body. Investigators say she was shot several times.

The shotgun used by the suspect was located at the residence. The shotgun was a single shot shotgun, which means that it must be reloaded to fire more than one time.

Police also discovered that the day before the murder, Twyman had changed his Facebook profile picture to a shotgun shell, with a shotgun in the background.

In response to comments posted, the suspect stated that the picture was “a slug fool,” that it was “gon be too late” if law enforecement tried to intervene, and “Once i handle my business i don’t give a (expletive)!”

Twyman has been charged with murder and no bail has been set. He is being held at the Chester County Prison.

Twyman and Woods have a daughter together.

“This is another example of domestic violence accelerating into a murder. A mother is dead and a child has been left an orphan. We will pursue justice for the victim’s family,” Hogan said.

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