Police officers? Advice?

I want to start off by saying I know several police officers that I consider my friends, but I wont go to them because I dont want my business out there. Just looking for some advice/venting.

I've been married to my husband for 5 years. We've been together 8. The past few years, he's changed. And not in a good way. He isnt physically abusive. But emotionally and verbally for sure. My husband is a convicted felon. Not for anything serious. He was a thief long before I knew him, he did his 3 years of time and I met him after that. He hasnt been in any trouble since. Has a good job and we have a daughter.

I've voiced to him how unhappy I am. How I dont want anything to do with him because of how he acts and treats me. I always find a reason to leave, and when I have to be around him, I pretty much ignore him. I haven't left for the fact that regardless of how awful of a person he is to me, hes an excellent father. Seems kind of wonky, doesnt it? My daughter and him adore eachother. He never says anything to her or around her. Shes none the wiser about anything.

The only thing I have on him is he smokes pot (which isn't legal in our state yet) but he never has enough to get in trouble with.

You're probably saying get to the point by now.

He told me that if I left or whatever that he would kill me. And given the state hes been in for a while and just knowing him...he isnt lying. I have text messages saying so. Him telling me he wishes I would die. He will look at me some times and say I just wish I could punch you so hard and knock you out. Especially if I wont give him the satisfaction of an argument.

At this point him being locked away would be better than if I just left. Because it's the fear of losing his daughter and me taking her that is the reasoning behind it. Are the threats enough? Should I go to the police. Would it even matter?