I have heard a lot of people on reddit say "even if your wife beats you, if you hit her back and the cops arrive, they will arrest you." I have even heard people say that" they were beaten by a wife/girlfriend. The didn't hit back. When they called the cops, his SO was assumed to be the victim, despite him being clearly the victim."

I have assumed that this is some fucked up law in the US. But after a google search, i couldn't find any such law. Is there any law, a policy or even police manuel/training guide that assumes the man to be the violent one by default ? Or is it just a social thing? Like police, due to the typical social view of abuse, just assume the man is the violent one by default.

Also, in any case, does anyone have any evidence of this phenomenon that is not anecdotal?