" on the back steps, there's an ashtray full of cigarette butts," lucy says. "i don’t think her dna's going to be a problem. or her footprints, fingerprints. the problem's him. he knows what he's doing. these days, everybody's an expert."
"no," scarpetta says. "they just think they are. "

― Patricia Cornwell , Book of the Dead (Kay Scarpetta, #15)