You will need to file a lawsuit requesting an injunctive relief. For that, it is strongly recommended that you have an attorney represent you.
It will cost a lot less if you sue the person for the...
It may differ depending on the jurisdiction or court system, or even the circumstance, but it is customarily the responsibility of the Sheriff's Office to serve court orders.
Generally not. Visitation is a civil matter, not a criminal matter and police have little authority or responsibility in any civil matter.
To enforce your visitation rights, you will probably need...