Maybe all the cocaine and beer bottles on his bedroom floor made them suspicious. (kidding)
The thing that might be the givaway in the story is the statement that it took the cops several tries to wake up the father. So there may be more than reported.
As the story stands, it seems wrong.
Also, you know there are libs that have no problem with this. Leftists love to make themselves so compassionate, but when you run into their legal types they are the most unforgiving persons on earth.