Michael Youlen stopped a driver in a Manassas apartment complex on a recent night and wrote the man a ticket for driving on a suspended license. With a badge on his chest and a gun on his hip, Youlen gave the driver a stern warning to stay off the road.The stop was routine police work, except for one fact: Youlen is not a Manassas officer. The citation came courtesy of the private force he created that, until recently, he called the “Manassas Junction Police Department.”He is its chief and sole officer.He is a force of one.And he is not alone. Like more and more Virginians, Youlen gained his police powers using a little-known provision of state law that allows private citizens to petition the courts for the authority to carry a gun, display a badge and make arrests. The number of “special conservators of the peace” — or SCOPs, as they are known — has doubled in Virginia over the past decade to roughly 750, according to state records.