Can cops marry each other?

Yes. But in most departments couples may not work together. Two officers dating (straight OR gay) may not work together. In many departments there actually are rules against officers dating within the department.

What is the divorce rate for police officers?

The divorce rate of police officers ranks second in the nation, compared to other occupations. The national divorce rate is approximately fifty percent while the divorce rate for police officers is sixty to seventy-five percent (Goldfarb).