Except that's a really serious felony far and above other statistics fiddling, Baltimore at its worst didn't go that far - you're making yourself an accessory to murder after the fact. Not only would you have Federal authorities getting interested quickly but you have pesky family members raising queries about how their loved one shot themselves to death 34 times on a street corner.

Even in the darkest days of Baltimore I don't think there were allegations of homicides being declared as suicides.

You can sometimes report a homicide as a suicide. Not very often, given things like the relative unpopularity of multiple gunshot wounds from a moving car as a suicide method, and so on.

And if the victim has life insurance, reporting a homicide as a suicide has insurance consequences, the family would provide resistance to.

I have no data for this (other than watching TV) but reporting homicide as suicide is probably more likely due to incompetence rather than malice.