What reason did the PD give for taking the pellet gun? How do you know they have it?
What reason was given for the restraining order?
How exactly did your sister "break in"?
By what manner were you given 50% of a property?
Who owns the other 50%?
What exactly was your question? By the category and title I presume you want to know if all this is justification to break a lease agreement? That is confusing because you are also saying you are a part owner and there should not be a lease situation.
Did you miscategorize the question?