He shared the following timeline of events of how the Easter tragedy unfolded on Facebook.
But Pennsylvania State Police say there was a hit to a cell-phone tower, in Erie - at 4:30 Sunday afternoon - a little more than two hours after Stephens allegedly shot and killed 74-year-old Robert Godwin on a Cleveland street.
Authorities said Stephens pulled up in his Ford Fusion on a road in East Cleveland about 2 p.m. Sunday and then said in the Facebook-bound recording: "I found somebody I'm about to kill".
The man wanted in connection with a fatal shooting after video of the incident was posted on Facebook is dead following a brief pursuit in Pennsylvania on Tuesday.
What is Facebook doing now and what can it do in the future?
But some have criticized Facebook for making users its first line of defense.
In a message posted on Facebook on Tuesday, police confirmed that Steve Stephens had died by suicide after a chase in Erie County, Pennsylvania.
The gruesome video stayed up for hours on Sunday before it was removed by Facebook. Without those reports Facebook moderators would not be aware of them.
"Could it be that there was always kind of a lead in Erie that they were not telling us about?" This system "already generates about one-third of all reports to the team that reviews content", according to Zuckerberg's post.
While this last story of this coward may be amusing to some, may we remember his victim, Robert Godwin Sr.
At Facebook's F8 developer conference, CEO Mark Zuckerberg acknowledged the company has a lot more to do to prevent posts like this one, from being spread around the world, giving attention to the criminal posting them.
"We are grateful to the people that gave this tip", he said. "We would prefer that it had not ended this way, because there are a lot of questions I'm sure that not only family, but the city in general would have had for Steve, as to why this transpired".
Facebook also announced improvements to its Messenger platform to encourage the use of bots - a facility first unveiled a year ago.
Police say Stephens had a permit to carry a concealed weapon.
Pennsylvania State Police look over a vehicle as they investigate the scene where Steve Stephens, the suspect in the random killing of a Cleveland retiree posted on Facebook, was found shot dead Tuesday, April 18, 2.