Except the film never confirms Sparma was the killer, so we're left with this ambiguity over whether Baxter killed an innocent creep or a cold-blooded killer, and the unsettling knowledge that these two cops have now covered up two murders.

Is Denzel Washington the killer in the little things?

Ultimately, Deacon is a killer, having accidentally killed a girl who was a victim in his unsolved case from years ago. Instead of confessing to the accidental shooting, he gets his then partner and a medical examiner to cover up the killing, which is more of a crime than the accidental shooting.

Was Sparma the killer in the little things Reddit?

Sparma has a police scanner. He goes to murder scenes and rearranges the corpses for sexual pleasure. He isn't the killer, but he enjoys playing games with the police. That's why the killings continue, after he is dead.