Here's another example of excessive force noted in the DOJ's report on the Seattle police (three more here), this one involving an attempt to recover drugs:

For example, in the course of one arrest, an officer made contact with a man whom he suspected had put a bag of crack cocaine into his mouth. The officer used his baton to pry the man’s mouth open so that a second officer could take out the drugs. This is an inappropriate use of a baton. Yet, despite the fact that the officer’s supervisor identified the inappropriate use of the baton, neither the supervisor nor anyone in the chain of command identified this incident as an unreasonable use of force.