A Georgia sheriff who reopened the case of teenager Kendrick Johnson's 2013 death released a report saying the death was an accident.

Johnson, then 17 years old, was found on January 11, 2013, inside a rolled-up gym mat at Lowndes High School. Lowndes County Sheriff Ashley Paulk told WCTV he obtained the documents related to the case and had been poring over them for the past year.

"From the documents I've read and the investigation I've seen, I feel 100% sure there was no foul play," Paulk said. "It's a terrible accident, in my opinion."

Paulk's report stems from 17 boxes of evidence from several different agencies, including the FBI and Department of Justice, WCTV reported.

According to WSB-TV, Johnson's mother, Jackie Johnson, does not trust the local authorities' findings and wants federal investigators to look at the case again.

"You didn't find nothing in 17 boxes?" she said. "That's the craziest lie you could have told. We already knew what team you were on. You are not on the team of righteousness."

The sheriff's 16-page report is divided into several topics investigators focused on, including other high schoolers who could have had a problem with Johnson, Johnson's multiple autopsies and observations of where the body was found.

The report also said the FBI investigated 62 cameras around the school, focusing on Johnson's movements as well several "targets" to rule them out as suspects.

According to WCTV, Johnson's parents suspected then-classmates Brian and Brandon Bell had something to do with Johnson's death. The report said Johnson and Brian Bell got into a fight in November 2011, but student testimony said there was no animosity between the two and they later worked on a class project together.

NBC reported that the Bells' father was an FBI agent until he resigned after his house was raided and searched during the investigation.

Johnson's parents filed a $100 million wrongful death lawsuit against the brothers in 2015, which they dropped in 2016, WCTV reported. The camera footage showed Johnson did not cross paths with either of the Bell brothers on the day of his death, the sheriff's report said.

Seven different people, including a coach and one of Johnson's relatives, testified that students would store their shoes and other objects inside the rolled-up gym mats, the report said. One of these people said students would frequently crawl into the mats to get their objects.

Of the three autopsies done on Johnson, the first and third concluded the cause of death was positional asphyxia and said the manner was accidental, the report said. The second said the cause of death was "blunt force trauma to the right neck involving the right mandible," but five years later was updated to "blunt force trauma, right thorax," which required a second exhumation of the body.

NBC reported that a documentary was made called "Finding Kendrick Johnson" and can be watched on-demand.

In his conclusion, Kaulk wrote "I am quite sure there will still be a contingent that will believe there was foul play. I encourage everyone to study ALL the evidence in this file before forming an opinion."

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