OK not to say that this happened here, but the police saying 'nothing to see here, move along' and claiming everyone is safe..well in DV incidents, its not always the case. My mother was nearly killed only minutes after the police were apparently satisfied that her partner was not a threat as he 'had calmed down' and they basically blamed my mother for overstating things, even though it was the neighbour who rang the police. They left, and minutes later his hands were round her throat. Similar things happened a fair few times too. She has a drink driving record because..he had started hitting her and the police had been called but did not take it seriously (were laughing with him about how 'everybody argues'

While her eye was swelling up) and left her alone with him again so she got into her car even though she knew she was over the limit to get away frm him to..well stay alive. I have many stories of police being woefully inadequate in DV incidences, and believing the bloke even though he has a history of GBH and stuff :/
Obviously not claiming this happened here, but police, from my experience anyway, do not take domestic incidences too seriously and prefer to be in and straight out. So that they 'no crimed' this means not that much, hell some rapes are even no crimed these days.