She did have a ring camera doorbell fitted so i expect the police might have seen someone enter the house. Often, anyone passing through a village or any road these days is on camera from a house.
My own 4 cameras capture images of the area outside the front door and rear garden and garage are kept on a hard drive for 14 days before over writing.
The way this Country is going, you will need cameras on your house. There are some weird men walking along my road now when schoolchildren are out. They constantly walk up and down. Less so now one has assaulted a young girl recently and police sit by the school.