Prosecutors revealed new details Monday in the killing of an Upper Macungie Township woman by a man involved with her teenaged daughter.

Caleb Barnes, 20, an Army soldier, a specialist E4 stationed at Ft. Meade, Maryland, is who authorities say was involved with Cheryl Silvonek's 14-year-old daughter.

Barnes killed 54-year-old Cheryl Silvonek early Sunday morning and then disposed of the body with the help of the teenaged girl, District Attorney Jim Martin said. Police believe Silvonek was killed sometime between midnight and 2:30 a.m. Sunday.

Barnes is charged with homicide and abuse of a corpse. He is in Lehigh County Jail without bail.

Caleb Barnes

Martin said he would not identify the teenaged girl, the victim's daughter. As Martin held a news conference Monday afternoon, he said a juvenile detention hearing was being held for the girl.

Prosecutors were considering charging the girl with abuse of a corpse, tampering with evidence, and hindering apprehension, Martin said.

TIMELINE AND MAP: Lehigh County fatal stabbing, burning and burial

Barnes and the girl met last October at a concert, Martin said. Barnes was on a weekend pass and was due back at the base Sunday night, the district attorney said. Barnes, the girl and her mother attended an Eric Church concert in Wilkes-Barre over the weekend, prosecutors said.

Cheryl Silvonek became aware of her daughter's relationship with Barnes and tried to have her break it off, Martin said. Barnes stabbed Silvonek multiple times in the neck in her car in her driveway in Upper Macungie Township; the girl was in the car at the time, Martin said.

The victim had defensive wounds on both her hands, according to Martin.

Martin said there are differing versions of the stabbing.

The pair then took a different car, drove to the Walmart in Lower Macungie Township and bought supplies to try to cover up the crime, Martin said, including alcohol and bleach. Surveillance video shows the pair leaving the store about 2:30 a.m., Martin said.

The pair took the vehicle with Silvonek's body, drove to 5700 block of Haasadahl Road, a rural two-lane road in South Whitehall Township, where prosecutors say Barnes burned the body and buried it with the girl's help in the woods near the Haasen Creek.

But Ray Werley saw the car about 4 a.m., and when he checked it with a spotlight he saw a large amount of blood and called police.

Barnes was arrested at the victim's home in the 1500 block of Randi Lane. Martin said the victim's husband, David Silvonek, was unaware Barnes was in the house or that his wife was missing when police arrived.

In an interview with officers, Barnes confessed to stabbing Cheryl Silvonek in the neck in the family's car while it was parked in their driveway, records say.

After getting rid of the body, Barnes and the girl then pushed the car into a pond at Applewood Drive and Huckleberry Road, and walked back to the Silvonek's house, according to court records.

Cheryl Silvonek was employed at the time of her death at Lehigh Valley Health Network, spokesman Brian Downs said. He would not confirm her position, citing efforts to protect her family's privacy. Online records list her as a medical secretary.

Coroner Scott Grim pronounced Silvonek dead at 7:23 a.m. in the woods where her body was found. Silvonek died of multiple sharp force injuries to her body and Grim ruled the death a homicide.

Sarah Cassi may be reached at scassi@express-times.com. Follow her on Twitter@SarahCassi. Find Lehigh County news on Facebook.