TAYLORSVILLE, N.C. -- A North Carolina couple is charged with first-degree murder after a deputy pulled over their van and found a woman's body inside.

Investigators said Lisa Damron, 31, was driving the van on Interstate 77 in Wythe County, Va. Her husband, Jerry, 42, was in the passenger seat. A deputy pulled over the van for speeding and charged Lisa Damron with driving under the influence shortly after 8:30 a.m. Friday.

The deputy then searched the van and found the body of a woman. Investigators said she was shot to death.

Authorities identified the woman as Kelly Cully, a former neighbor and friend of the couple.

Investigators said the woman was killed at the couple's home in Taylorsville, N.C. According to a warrant, Lisa Damron said the couple got into an argument while drinking with the woman and she heard several shots fired. She said she helped her husband wrap the woman’s body in a blanket and put it in the van. She said they were on their way to West Virginia to dump the body.

Jerry Damron was charged with driving while impaired and felony death by motor vehicle in a crash that killed his son last fall.