What should my next moves be?

My husband and I were together for 3 years, he was emotionally abusive, controlling and manipulative. His family has a history of the same behavior and drug use. MIL never liked me. (destroyed personal items, attempted to physically assault me etc)
I left 8 months ago and we agreed we each take one dog but the one he took doesn’t go near his family. As they are neglectful with animals.
When he randomly joined the military we agreed that the husky (the one he took) stays with my grandmother as she is trustworthy with animals.
I move to Florida for the winter for my job and as soon as I left, his mother and him decided on a different plan. Then told me how it was going to be. (Splits time between MIL and my grandma) now the MIL is refusing to return the husky. (Her papers are all still in my name) I also find out that he is not filing for divorce as we planned and is using the spouse benefits to give to his mother. Whom pretends to have illnesses/injuries and is unable to work yet is out doing things and moving furniture constantly.
I am distraught over my poor baby knowing she’s most likely starving and having to compete with my MILs other 3 dogs for any water or food.
I also found out my truck somehow got put into his name at some point and I had no idea.
I just want my dog to be safe and that insane family out of my life. I can’t think straight so what should my first steps be aside from getting an attorney.

What should my next moves be?
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