by KYW’s Brad Segall

A Delaware County, Pa. man wanted for the murder of a Chester County man in what authorities are calling a “love triangle” killing has been taken into custody in Colorado.

West Goshen (Chester County) police say Stephen Shappell was wanted for the murder of his boss, Kevin Mengel Jr., whose body was found buried behind Marple Newtown High School.

Police believe the 22-year-old man was having an affair with Mengel’s wife Morgan (right), and the pair conspired to kill him.

Police chief Michael Carroll says Shappell was arrested Sunday night by police in Denver, Colo., after authorities here were able to track his cell phone:

“They went out to that area, and in a very relatively short period of time were able to locate him on the street.  He went into a store and they (authorities) went in and without incident took him into custody.”

Authorities are now working to bring Shappell back to the area to face murder charges.

Police believe Mengel’s wife tried to poison her husband.  And when that failed, they say, Shappell beat the man to death with a shovel.