[the_matrix_walker]

Marcus calls the "Blind Line" and listens to thee fake recording indicating he's calling a cleaning company after hours, and speaks in the expected code.

"The two oil stains were removed successfully... But the blood stain didn't come out yet. The customer came back with a pair of grass stained pants."

He hangs up and gets a fix on the errant shapeshifter, and drives off to continue the pursuit.