"Had to wait"?
IANAL, but the great and wonderful Wiki says the US has no-fault divorce in all states and DC.
What obligated him to stay? What prevented him from leaving? Why did he need cops to *leave*?
Getting a dissolution is easy, i.e. "not being married anymore" is a no-brainer in 99% of cases.
Getting divorced on favorable terms is completely different. In the GP's case, the wife was allegedly the one being abusive and assaulting the husband. Proving such a thing requires a paper trail. Said paper trail goes a long way toward favorable divorce terms, such as "the non-abusive ex-spouse receive custody of the children as well as titled property."