In a large room covered in mats, Nicholas Romero and Martin Gutierrez roll around testing out different grappling techniques, holds, and escapes. Nearby, Nicholas Provencio thwacks one of several heavy bags on a far wall. Later he and Gutierrez climb into a brand new boxing ring for some sparring, with Gutierrez catching punches on a pair of mitts that are just getting broken in. At first look, the latest addition to the Santa Ana Police Department looks like a nicely tricked-out fight gym, complete with a new leather smell. However, this is actually the home of the agency’s brand new…