Attorney Ben Crump says Nolan Xavier Wells’ family is pursuing an independent autopsy. Investigators continue working to determine what happened to the 18-year-old after his body was found on Horn Island this week.

Wells, 18, went missing on Saturday, July 4, after taking a boat to the island with friends. A body was found Monday, ending a two-day search.

Jackson County Coroner Bruce Lynd told the Sun Herald on Tuesday that the body was identified as Wells. The State Medical Examiner’s Office used dental records to confirm his identity. Officials did not release his cause of death.

In an exclusive interview with Don Lemon on Wednesday, Crump said the body was being flown to Washington, D.C., for a medical examiner to study.

Wells’ disappearance led to an outpouring of prayers, volunteer efforts and community support. By Wednesday morning, a GoFundMe to help the family had raised more than $237,000.

There are still many questions about why Wells was on the island after the boat with his high school friends left. What happened before his death remains unclear.

On Tuesday, his family hired nationally known civil rights attorney Crump and his team to help them find answers in the case.

What was Nolan Wells’ cause of death?

Crump said the second autopsy will find out “if he had any physical injuries to his body beyond drowning.” He was unaware of the physical condition of the body at the time of the interview.

The remains were being flown to Washington on Wednesday. Crump said his team expects the results on Friday.

Crump said investigators in Mississippi have not given them information about the state’s autopsy.

Crump says family is living in a nightmare

Crump told Lemon the family is living in a nightmare, and they still have many questions about the young man’s death.

He was clear, however, that his investigation is still in very early stages and they are not sure yet if they will find signs of foul play. If they do, he said, they will work with local law enforcement and the state if there’s anyone who should face criminal charges.

According to the attorney, the sheriff’s office has not shared information with the family about what happened and whether the sheriff’s office suspects criminal behavior.

“There’s no information that we have right now that would lead us to believe that a crime has occurred,” Jackson County Sheriff John Ledbetter told ABC News earlier this week.

He said the family has concerns about “inconsistencies” including texts deleted from Wells’ phone. They don’t want Wells’ death to be called an accident and swept under the rug if it wasn’t.

Crump said Wells had a tryout to play Division I football on Monday. The teen was reportedly avoiding substances that could affect his performance. His family said he was an extraordinary athlete and strong swimmer.

There was allegedly an argument on the island, Crump said. Now, Wells’ family isn’t accepting that his death could be a coincidence.

Lemon asked if they knew what the argument was and if Wells and his group were involved. Crump said they have an investigator talking to Wells’ friends. He plans to share the information when the issue becomes clear.

Crump said investigation, not speculation, is the goal.

Questions remain after Horn Island death

Ledbetter said the county’s investigation is still active.

According to reporting from TMZ, the sheriff’s office was investigating a video shared on social media that appears to show people arguing on Horn Island on the holiday. It’s unclear if the footage, which shows a crowded beach, is related to the case.

Crump and his legal team are planning their independent review. They have committed to urging “the timely release of all records, witness accounts, and autopsy findings.”

What investigators know so far

Wells was reported missing over the holiday weekend after traveling to Horn Island with friends on July 4. The barrier island is part of Gulf Islands National Seashore.

Wells, who also went by Nono, was last seen on the northwest tip of Horn Island on the afternoon of Saturday, July 4. He did not come back to the mainland with his group, and his mom reported him missing that night.

The Jackson County Sheriff’s Office led a search on land and water Sunday and Monday. The Mississippi Department of Marine Resources, National Park Service employees and the U.S. Coast Guard helped with the search. The United Cajun Navy and other volunteers also worked to find Wells.

His mother, Christine Wonsley, said during the search that she and his father had received Wells’ phone. Location tracking wasn’t an option while they looked for him.

A park ranger found the body Monday morning. The identification was confirmed Tuesday following an autopsy.

Investigators are still trying to determine why he didn’t leave the island and who he was with. They’re limiting the information released at this time as deputies work to find witnesses and collect evidence.

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Authorities seek witnesses, photos and video

Ledbetter issued a statement saying rumors, commentary and unchecked information spreading on social media have been a challenge in the investigation.

Deputies need to speak to people who were at Horn Island. They’re also looking for original photos, video or sound recordings.

They are asking anyone who saw or heard an “argument, disturbance or other unusual activity” on the island to come forward.

Call 228-769-3065 during regular business hours or 228-769-3063 after hours if you have firsthand information about the case.

Bonnie Bolden is the Deep South Connect reporter for Mississippi with USA TODAY Network. Email her at bbolden@usatodayco.com.