What can I do in this situation?

You can likely file an action to take possession of the vehicle. You may be able to self-help take possession of the vehicle if you have title to...

She likely has a month to month lease implied in law. You will need to evict her. Another option may be a family violence based temporary...

"They" can not stop her from selling the trailer if it is your fiance's cousin. The new owner would have issues because they have no right to...

Can someone be prosecuted by the state for sending nude pictures as a minor to their boyfriend even if 10 years have passed?

I think you are unlikely to have any current criminal liability.

How to get my car back when your 18 and parent have the car title in their name and won't give it back?

You will have to sue. See an attorney.

How to evict a person living in a Condo after death of the owner

File a dispossesory in your dead relative's name in magistrate court. OR have you lawyer do this for you.

Can new management collect past due rent owed to the old management?

Probably. What does your lease say.

Swear out your own warrant.........................

Shouldn't the U-Haul or my friend's rental insurance have some liability that would cover some of the property?

Read the contract and or get an attorney to read it.

Substantive violation?

He could spend the rest of sentence one in jail, and be sentenced to more time, no more than 1 year, for charge 2. That would be worst case.