[Moneyguy1]

The problem here is we weren't there. Not knowing all the facts, such as were the doors really chained from the inside? We are just second guessing.

Yes....the police are not prescient. They cannot act like "Minority Report", so they wind up coming around after the deed has been done. How else could it possibly be? If any preventable action is taken, it is in the form of education, such as undertaken by Fire Departments in door-to-door voluntary inspections, explaining the virtues of escape planning and fire/carbon monoxide sensing devices, and Police, with neighborhood meetings, teaching why certain types of locks etc are a deterrent to breakins, and showing how to reduce the chances of car theft and personal injury. There is little that can be done other than that directly for the public, and the rest of the time is spent hunting down perps and keeping an eye on known troublemakers.