Window break in and theft at property stealing new tenant stuf

[Gp G.]

I have theft broke back window and stole some boxes from new tenant who just moved in few days back while no one at home. How to identify and find egress (fire exit) windows. Any good sources to find the crime index of a particular zip code. This is the first incident in the last 4 years. One gas station with 5 different shops came behind this property about a few months back and attracted all kinds of foot traffic and bike traffic going through my property. I put a 6 feet chain link fence and privacy black sheet as well in the back fence. Still there was about a 1 feet gap next to my fence and before my neighbor's fence starting point. I spoke to my neighbor who joined his fence with my fence closing that one feet gap. My neighbor seems to have had one break in in the past 1 year. After that he put an iron back door instead of a wooden back door.  I am thinking of putting external burglar iron bars if insurance allows. If not, I cannot put external burglar iron bars . Can there be removable burglar iron bars that can be placed from inside the property onto the window to avoid issues with the insurance company? It is costing about 1000$ to fix broken window. Does my or tenant insurance cover that? Is it good idea to discuss this issue with insurance agent or just silently pay from my pocket to contractor as it may increase premium right? Tenant feels not safe and mentioned like leaving property as well. Is there is a chance tenant may leave ? Please advise
Thanks,