I am so sorry that this has happened to your daughter. Unfortunantly, it is not a requirement on the sellers disclosure statement in St Louis, in fact there is not even a section for "break-ins" and "theft" on the form. There is however, a requirement on the sales contract for the buyer to check with their insurance company to see if the home is insurable within 10 days of having an accepted contract. While the home may have been insurable, her rates were probably higher because of the previous break-ins, so I am surprised that her insurance agent didn't make a comment at that time about the break ins rather than telling her about them after 2 more break-ins had occurred.
I would suggest that your daughter check with her municipal police dept, as many will do a courtesy walk through of a home and give suggestions on ways to help prevent crime, the types of locks and alarm systems that are best, etc. I would also suggest that she make a point of meeting her neighbors and talking to them about the break-ins and seeing if they have had issues as well. I would also suggest that she talk to them about setting up a neighborhood watch so they all look out for each other. A great way to start is with a neighborhood get together (cookie exchange perhaps for the holidays) to get to know each other and to start the ball rolling
It is actually illegal for a Realtor to say that an area has a high crime rate, the most we can do is refer a buyer to the local police and websites to check ALL the homes they are looking at for their crime rate, if we tell someone to check the crime rate for one neighborhood, but not for another, we can get in serious trouble. Here is one of the resources that we refer clients to: