You should speak to an attorney ASAP. Someone gave your brother-in-law the authority to sell your mother's home. He has abused that authority and converted the proceeds to his own use. You need to commence a legal action before he spends that money. You should discuss a criminal complaint.
Husband refuses to sign dowry on property being purchased
Yes, it can be considered theft if someone refuses to return your property, as they are unlawfully keeping something that belongs to you.
The executor should petition the court for the right to sell the property.
because they don't want to...
According to our laws in Tanzania a police under Criminal Procedure Act can enter someone's property for emergency search
It depends on who you mean by "us". If your mother refuses to give you property that is legally yours, contact the police. If it is jointly owned with your mother, you may need to file a lawsuit to have the property divided.
hubris
The landlord refuses to return personal property until the balance of his rent has been paid. 3 months have passed.
If it is company property then the ex-employee has no choice but to return it! If they refuse then the company can report it to police as a theft and you can be charged criminally.
Because he is lazy and refuses to study
To legally trespass someone from a property, the property owner or authorized person must give a verbal or written notice to the individual, informing them that they are not allowed to be on the property. If the individual refuses to leave, the property owner can contact law enforcement to enforce the trespass order.
The executor should not have allowed the property out of her/his possession. It is their duty to safeguard the property on behalf of the heirs. The executor will need to sue the person who has taken the property.