COLONIE, N.Y. —  Police are puzzling over what would motivate a father and son to haul off six tombstones from a monument company in suburban Albany.

Town of Colonie Detective Lt. John Van Alstyne says he's not sure what kind of aftermarket there might be for the hefty granite grave-markers.

Police charged 35-year-old Demetrius Lanier of Albany and his son, 19-year-old Shateek Lanier of Troy, with felony criminal possession of stolen property. They were sent to Albany County Jail without bail.

The men were arrested after police got a call around 1 a.m. Sunday about a suspicious truck at Stefanazzi & Spargo Granite Co. A traffic stop of the rented truck turned up the six monuments, which weigh 300 to 600 pounds each and are valued at $6,000.