It was a brutal murder that the world couldn’t even imagine. On the 30th anniversary of John Lennon’s death, we take you inside his final moments and the chilling plot of Mark David Chapman, the crazed killer who took his life.

Tune in Friday at 10p/1a ET as Bill Hemmer hosts Fox News Reporting: The Last Days of John Lennon.

And, check out this exclusive behind-the-scenes look as the Insider went On Location with The Last Days of John Lennon.

Check back tomorrow for exclusive photos of the filming of this special.