She lived on a long stretch of empty road right off the highway. With so many rumors of it being haunted, she fit right in. It helped that she looked like the urban legend of a disappearing hitchhiker.
Rumor had it that if you picked up the ghostly hitchhiker, she'd disappear half-a kilometer down the road and crash the vehicle. More likely that the freaked out driver lost control of their cars or truck and fish-tailed into a ditch than the hitchhiker making them crash. It's not like they were harmed. Well... mostly unharmed.
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The thugs who were currently cursing at the empty security truck weren't so lucky one was already down. Hair turned white and hand-shaped welts around his neck. He was only unconscious. She din't need to kill him to feed. Not when there were so many lovely snacks. She dropped thug 1 in the driver's seat.

The other thugs slowly noticed that one of their own was missing when they heard the thud. All arguments stopped as they approached the front of the truck, guns out. Then the truck started moving, even if though with the engine off. The road was flat (no sign of an incline), so it couldn't be the handbrakes.
The truck stopped again. This time they reached the front doors and opened them from both sides. As one they peelef inside.

All of them were later found unconscious by Inspector Lee and his partner. Hair turned white and with hand-shaped welts around their neck.