Possession of a report does not equal right of use, and those granted permission to rely is not the same thing as the intended use, though it is easy to confuse that fine line. 

Your mother's estate will be liable for this and her personal possessions can and will be ordered by the court to be sold to satisfy this judgment. 

Had an incident recent whereby a tenant, who possessed a handgun, used it in an altercation at a property I own.

You don't have the right to list the property or allow anyone in there prior to taking possession. 

I recently came into possession of some C2 land in Bullhead City, AZ.

Upon a walk through before closing, we discovered the occupants are still there.The purchase & sales agreement stated that "buyer shall obtain possession at closing - property shall be free of all tenants & occupants as well as personal property".The mother of the family owned the property; she lives in Michigan.

How do I take possession of the property?

Our first one was unoccupied as the homeowner had died so we simply took possession the day of the deed being recorded in our names.

Theoretically, if all that has been done, and he doesn't rent you the unit because your brother told him not to, you could sue him in small claims court for the cost of moving your possessions to storage and a hotel room. 

Additionally, we were hoping that either A) The new Bankruptcy Case will get dismissed or B) His Bankruptcy will go through and he will be granted a Discharge, after which we could then seek an Order of Possession (AGAIN).