Person in custody for execution-style shooting near Mount Pleasant Mansion

PHILADELPHIA (WPVI) -- Police have not yet identified the person who is in custody in connection with last week's execution-style murders in Philadelphia's Fairmount Park.

On Monday, police released photos of a man they say is a suspect in the crime.

Hours later, someone was taken into custody.

However, as of Tuesday morning, no formal charges have been filed against that person.

The double murder happened Thursday night. Police were called to Mount Pleasant Drive in Fairmount Park shortly after 11 p.m.

When they got on scene, they found a man and woman lying next to each other in a gully on the side of the road.

They described the crime as an "execution-style" shooting.

It all happened close to the Mount Pleasant Mansion, which is a historic site that was once owned by Benedict Arnold. It was closed to the public last year.

The victims were later identified as 49-year-old Thurston Cooper and 38-year-old Krystina Chambers.

Action News spoke with Terri Chambers, the mother of Krystina Chambers, about the arrest of a suspect. She said it right now, it provides little closure as her family continues to grieve.

"It doesn't bring Krystina back. It doesn't bring her back for her children," she said. "I do hope if it is the one, I hope they put him behind bars so he doesn't do this to anyone else."

Chambers said her daughter leaves behind four children, ranging in age from 12 to 17.

Action News spoke with one of her sons last week.

"Everybody should stop shooting and the world could be a better place and I could see her up in heaven one day," said Chambers' son, Taye Evans.

"I hope and pray she's ok. I hope that she will make peace and that she's with the Lord," said her mom, Terri Chambers.

Family members said they are grateful they had a chance to speak with Chambers hours before she was killed.

Further details on the murders have not been released.

Anyone with information on this case is asked to call police at 215-686-TIPS.