In the past 10 years, the football world has come to grips with the death of former Arizona Cardinals safety Pat Tillman while he was enlisted in the U.S. Army in Afghanistan.

But that doesn't mean all the questions surrounding his "friendly-fire" death have been answered.

Next week, ESPN will take another step in piecing together what happened on that fateful day, according to Sports Illustrated's Richard Deitsch. A decade to the day of Tillman's death, ESPN's "Outside the Lines" talks with former U.S. Army Ranger Specialist Steven Elliott, who was believed to be one of the shooters.

The interview will air from 8-9 p.m. ET April 22 (ESPN).

Included in the piece will be former quarterback Jake Plummer, who was Tillman's teammate with the Cardinals and at Arizona State University.

The story came together last November, according to Deitsch, after ESPN investigative reporter Mike Fish revived a quest to talk to the shooters involved in Tillman's death.

"Fish spoke with the four men believed to have fired on Tillman's position, as well as the driver of their vehicle," Deitsch said. "He spoke in some instances with relatives in hopes of convincing an individual to speak. He spoke with every shooter or relative multiple times, even through rejections.

"Finally, one agreed to talk."

Deitsch has more on the backstory of Fish's reporting here.