Here's the plot:
Comment: This was a typical episode of SVU, about average in quality. Beach and fellow actor Diane Neal left with a bang--i.e., some showy acting. So did their characters--but not in a good way. Chester Lake wound up looking like a grim, stoic Indian, a classic stereotype. Casey Novak seemed like an out-of-control vigilante, lying baldly to her superior. Neither portrayal fit the characters we've come to know.
At the end we had little idea what was going through Lake's mind other than a murderous rage. "We" identified with the shocked Stabler and Benson, the good white cops. They looked upon Lake as if he were an outsider, a stranger, an alien from another world. He had reverted to an Indian "type" and almost nothing human was left.
Killers get away with murder all the time, so should someone hunt them down and shoot them? In the Shark season finale, lawyer Stark was faced with an escaped mass murderer who had threatened his daughter. Given the chance to shoot his enemy, Stark declined.
But SVU handled the same dilemma differently. Lake saw an opportunity for revenge and took it. So if the protagonist is an Indian whose ancestors were "savages," the answer to the above question is yes.
We've seen this presumption on several TV shows with Indian characters. If it's a police procedural, the Indian is likely to be the killer. SVU was an exception, but it isn't anymore.
For more on the subject, see TV Shows Featuring Indians and All About Adam Beach.