Stoker, alias Finklerock, is an agent of the mysterious Machination. He's good at his job - which bodes ill for him, as his job entails messing with big angry robots.
IDW comics continuity
Apparently operating out of a trailer in Tucson, Arizona under the name "Finklerock", Stoker infiltrated a Decepticon bunker in Nebraska and took pictures of the interior, storing them on his SM-40 computer. Stoker boarded a bus in Phoenix, and had his SM-40 stolen by Verity Carlo while he napped. Before he could discover the theft, he was killed by Decepticon agents Runamuck and Runabout. His body was somehow removed from the bus and dumped in the desert, where it was discovered by the police (among them a Machination agent, who reported his demise to his employers). Stoker's trailer was subsequently destroyed by Blitzwing and Skywarp , and his SM-40 eventually fell into Autobot hands, leading his Machination comrades (via a homing device in the computer) to their base.
While investigating the SM-40, Nightbeat designated Stoker "Rogue-1."