I think that you missed it. As has been posted here more times than I can count . . .
People commit many serious crimes and basically walk or are set free after a very short sentence, only to repeat over and over again.
It's a "catch and release" system, not by design but by implementation in the courts. THAT is where the effort needs to be concentrated and since judges are appointed for life and answerable to NOBODY, I don't see that happening in my lifetime in MA.
Police have no influence on this, ask some if you want.
DAs are over-burdened and prefer a plea-bargain to a trial, so that feeds the badness of the current system . . . and the judges go-along, to complete the travesties.