I'm sorry you are not feeling safe in your very own home!!!!
But I will say...Karen said exactly what I was thinking...Be in Touch with the local POLICE....Ask How is this person being Monitored and how Often????
It is Yours,and your Moms' rights as Citizens to know......
And like everybody else said...Do not leave your Pets Unmonitored for a Moment.....

Good Luck
All Paws Crossed for You