If who wasn't a drug dealing criminal?
The boyfriend? He didn't live there and his name wasn't on the search warrant. He wasn't a drug dealer. He was a guy that worked a handful of jobs and was supposed to start a job working for the post office not long after the shooting occurred.
Yes, it appears that she used to date a guy that dealt drugs. But that isn't an excuse to bust down her door when that guy was dealing drugs 10 miles away on the other side of town and wasn't with her anymore. Heck the prosecutor tried to give that guy a plea deal to reduce his drug dealing charges if he testified that she was helping him deal drugs. He refused.
I think you people defending the police need to read up on the facts of this case and others. Maybe you'll understand why so many people are upset. You can start with the Wikipedia article here:
en.wikipedia.org