" there was nothing.” “Did you look for oil drips?” Cole said it just like that, without accusation, and Chen felt himself darken. “What do you mean?” “The Lake Hollywood report mentions oil drips that you found at the scene. You took samples up there and identified the oil.” “Penzoil 10-40.” “If the shooter’s car was leaking up at the lake, it probably left drops here, too. If we found them, maybe you could prove they’d come from the same vehicle. "

― Robert Crais , L.A. Requiem (Elvis Cole, #8)