Child Custody Revision

[FutureLaw]

My question involves a child custody case from the State of: Michigan

I'm not going to put forth all the details and stuff, if necessary i may provide some.

Let's say, someone's, approximately 6th grade, parents were to get a divorce. In the end of that divorce, the father wins custody of this 6th grader and their siblings (4th grader, 4 yr old, and 2 yr old)
Now let's also say that part of the courts decision was because the mother was, let's call it, having a rough time with her life and all (take your pick on what you think i mean)
However, lets say, 2 years later, the mother has completely turned her life around, and is possibly a better suited parent than the father.

Is there a possibility that the court decision could be changed to at least having visitation rights???

Thing's to take note:
-Mother lives out of town, but is more than likely willing to move
-Father is physically abusive of one child, and mentally of all of them
-Father has completely torn the mother out of these kids lives, as well as anyone who contacts her

Please help ASAP
Thank you

[Dogmatique]

Mom should be able to get visitation, absolutely - even if it's only supervised.

(Unless she's abused the children herself).

1. Visitation will likely be in Dad's community at first.
2. What proof is there of abuse? Are child services involved?
3. If Mom hasn't seen the kids, how does she know?