cold-blooded

He said the Croatian journalist was trying to "present me as a monster, as an inhuman, as someone who not only has no emotions, but is a cold-blooded murderer".

Attorney Bill Essayli called the killing “a cruel, cold-blooded act” in a news release Wednesday.

It was murder, cold-blooded murder because he didn't get his own way.

Need I mention that a gecko is a cold-blooded lizard?

Speaking at the podium with a somber tone, Harbaugh said he met with Harris at halftime and described the running back’s demeanor as “cold-blooded,” adding that he told him: “You’ll be back, kid.”