New video is released from the investigation into the hostage situation that unfolded inside a Trumbull County jail cell on April 23 of 2014.

It's hard for deputies and investigators to forget that day. Three inmates worked together to hold Corrections Officer Joe Lynn hostage for five hours.

Lieutenant Eric Shay and Warren Police Lieutenant Jeff Cole are now sharing the lessons learned and tactics used to bring the tense moments of that day to a close. The two recently attended a conference focused on hostage negotiating in Baltimore, where more than 1,000 members of law enforcement were invited to attend.

"Having an incident inside a correctional institution isn't that common, and we actually have video of what happened," Shay said.

This is the surveillance footage that captures the moment when Lynn is on the staircase as he's pulled into a cell by inmate David Martin. Martin was facing the death penalty at the time and awaiting trial on murder charges. 

The inmates threw mattresses against the windows to obstruct view from the outside, they had a greasy liquid ready to pour on the floors to prevent anyone from trying to get inside, and they tied the door shut.

"Basically what they did is they tied the door off to a support pole and they just accumulated their sheets and coveralls and tied them together," Shay explained.

Those locks inside the jail were quickly swapped out for a new design.

"We had all of those changed," Tom Altiere said, Trumbull County sheriff. "Who would think that something that small could really cause a huge problem."

Among the other evidence, a spoon altered and sharpened to make a shank.

Shay credits Warren police Lieutenant Jeff Cole with talking down inmate David Martin from using it.

"Overall the training kicks in and the fact that you really can't predict, in a critical moment common sense prevails," Shay said.

Martin, Kevin Johns and David Ware are serving time in prison in part for their roles in a situation that could have taken a deadly turn.