ST. CHARLES, Mo. – The St. Charles Prosecuting Attorney’s Office charged two 17-year-olds Friday with the shooting death of a 64-year-old man in a local subdivision.

According to Lt. Tom Wilkison, a spokesman for the St. Charles Police Department, 64-year-old Roy Cedric Nash was found dead in his front yard in the 1800 block of Willow Oak Drive Thursday morning.

Within four hours, investigators identified and arrested Verjulia Watkins and her boyfriend, Damontaye Perkins, in connection with the killing.

"Based on the community and their approach to active awareness for their community or their neighborhood, a lot of cameras, lot of surveillance equipment is deployed throughout that community by residents that live there. That played a pivotal part in this investigation," said Captain Ray Juengst, St. Charles Police Department.

Police believe Watkins and Perkins planned and coordinated Nash’s murder following several lengthy disputes, Wilkison said.

Watkins was identified as Nash’s granddaughter.

Perkins was charged with second-degree murder, armed criminal action, stealing of a motor vehicle, and tampering with physical evidence. He was jailed on a $250,000 cash-only bond.

Watkins was charged with stealing of a motor vehicle, stealing from a person, and tampering with physical evidence. She was jailed on a $50,000 cash-only bond.

St. Charles County Prosecuting Attorney Tim Lohmar said he's confident he'll get convictions in this case.

"I would not be surprised if we have increased charges for one, if not both, of the suspects," Lohmar said. "I wish I could tell you more about that but we're very confident with the 24 hours that we have here, we could probably try the case tomorrow if we needed to."