What "good samaritan" puts a staggering half dressed hooker drunk in their car at 1 in the morning? Kim, with her out of state plates, picks up a half dressed drunk, puts her in her car and doesn't call police? Who does that? Wouldn't it have made more sense to go to Krogers, tell security and send police to the woman? No cop in their right mind would believe a sane person would put a random drunk in their car. I don't believe it "happens all the time."
If the cops didn't ask questions of Kim, they weren't doing their job..or they knew her.