Instead of risking another shot, he decided on another course of action, as he ran around to the other side of the desk, trying to keep as far away from the struggle as he could without abandoning his goal.
Quickly, he used the chaos as a distraction as he started rifling through the desk, and Grape Vine's pockets while he was unconcious. It wasn't hard to figure out that Starry was probably already captured, and so Shutter searched for a key, or anything else that could be useful that the slaver might have had on him...
Besides, more guards could come bursting through that door at any second. Who knew if they would have a chance to search for something useful again?