The Guardian newspaper has obtained a police recording of North Charleston police officer Michael Slager laughing after shooting Walter Scott dead and allegedly planting a taser gun on him last Saturday.

In the audio, Slager laughs while describing his “adrenaline pumping” immediately after the shooting Walter Scott at least five times in the back as the victim tried to flee. The tape captures a senior police officer running Slager through department protocols for a police shooting, which the officer also appears to find humorous. According to the Guardian transcript, the Senior Officer says:

“Probably once they get you there, we’ll take you home. Take your crap off, take your vest off, kind of relax for two or three.” “It’ll be real quick,” “They’re gonna tell you you’re gonna be out for a couple of days and you’ll come back and they’ll interview you then. They’re not going to ask you any kind of questions right now. They’ll take your weapon and we’ll go from there. That’s pretty much it.”

The Senior Officer also appears to be coaching Slager as regards his story. He pointedly remarks that Slager will not have to explain the shooting on the record immediately and will therefore have time to create a workable story for investigators:

“The last one we had, they waited a couple of days to interview officially, like, sit down and tell what happened,” he says. “By the time you get home, it would probably be a good idea to kind of jot down your thoughts on what happened,” “You know, once the adrenaline quits pumping.”

At this point, Slager laughs again and responds.

“It’s pumping,”

To which the senior officer replies:

“Oh yeah. Oh yeah.”

It is important to remember that the two men are not discussing a high stakes sporting event, but a killing. Slager is fresh from chasing down unarmed Scott, pumping several bullets into his back, and then appearing to plant a taser gun on him in order to justify what looks like cold-blooded murder in broad daylight.

Later in the recording, Slager can be heard answering a call on a cell phone and beginning to rehearse his story with the caller:

“He grabbed my taser, yeah. Yeah, he was running from me.” he says.

We now know from video captured by a bystander video that Slager planted the taser near Scott’s body after the shooting. Thanks to that video, Slager now faces murder charges.