Unfortunately, the notion that realistically Holmes would be charged for his crimes against Moran is incorrect. Even beyond the technical difficulties in pursuing a case against Moran's testimony, there is the question of what truly is more realistic. Would the police really want to pursue charges against Holmes?
They never like to pursue charges against official members who resort to torture and other forms of violence against perpetrators. Sadly it is highly unlikely they would want to make a case against an unofficial member. The unlikelihood of a conviction really makes it very im
probable, were such a thing to somehow occur in reality.
There is nothing realistic about momdern day Holmes. (Sadly the main realism in the original stories was the ignorance and incompetence of the police.) What there is, is a pseudorealism, where an illusion of realism is provided. So long as a superficial appearance is kept up, all is good. Violations of this pseudorealism is bad style and cleverness in maintaining the illusion is good style. But it's merely superficial.