And why not some (small) kids on the corner ? (left and or right).
Kids could somehow detect him (they are usually more smart because they have more neurones than us, adult xD) and point a finger, like if they saw a monster or something ?
Also, a black/yellow "Police line do not cross" line around the murder could be nice to see ? (but maybe a bit early ?)
Just small details, but that add cool things to look at in your piece : D
Nice grey scale ^^ (although maybe don't push too much the white on murder scene...but in a way...why not, your villain will be a "fog" in the end hehe)