Film like this?
I don't have any recs as to specific brands; just go by reviews.
Hope this helps.
Just a thought; if you are worried enough, I'm not sure there's any reason why you couldn't put it on BOTH sides of the glass; inside and out.
Obviously you might have to replace the outer layer after a few years exposure, but cheap insurance.....
Trespassing and fruit theft 🤔😂 isn't going to result in an arrest or jail time, just a warning if they went to approach them. If they have a warrant they don't need your security camera footage to find them and make an arrest. Sounds like Law Enforcement is just giving you a false sense of taking action to appease your complaint.
Start with basics, quality deadbolts, reinforced striker plate on door jamb, good lighting around the house. Fix any windows that don't lock correctly ASAP, recommend adding a security film. Home security cameras are just an electronic witness of an incident, and might be a small deterrent to some criminal activity. But some won't see the cameras, some don't care, or a few think they can outsmart the cameras.