[japaneseghost]

Cops know how to break into houses. They have to be able to break in to find people who are sick/dying/can’t pick up the phone. I have seen them do it, they can break into a window without damaging it within a couple of minutes, usually under 90 seconds.

For sure Dorner knows: the area,
how to tell if a home is occupied;
how to break into a home.

And probably, Dorner knows how to tell if a house has a basement, and how to live in such basement unnoticed.

[Jonty30]

He would need to run the risk of living in occupied homes. He’s only have to cheque the real estate listings for unoccupied homes.

[Uncle Chip]

And probably, Dorner knows how to tell if a house has a basement, and how to live in such basement unnoticed.

It's Los Angeles -- they don't have basements there.

[jttpwalsh]

Respectfully, I’ve lived in So.Cal. since 1981, have never seen a basement, here. Thanks.