Mars shook his head. “Doesn’t make sense.”
“Abigail was strangled, I believe, because that was the most plausible way to get Hawkins’s DNA under her fingernails. If they were that purpose-driven in the way they killed her, maybe there was a similar purpose behind shooting Katz twice in the head.”
“But what would that purpose be?”
Decker pantomimed a gun with his hand and held it to his temple. “Bang. The guy drops. They bend over him and, bang, shot to the back of the head.”
“Right, but why?”
Decker straightened and looked at his hand. “Because they wanted to cover something up that the temple shot didn’t accomplish.”
“What would that be?”
“Maybe a contusion on the back of his head.”
“From what?”
“From when he was knocked out.Beforehe was brought here to die.”