Nearly two weeks after Nolan Wells disappeared during a Fourth of July outing to Mississippi's Horn Island, investigators continue to piece together his final hours. Authorities have not determined a cause or manner of death and say they are waiting for autopsy and toxicology results.Nolan Wells' friend Tracestin Shepherd spoke about what happened on Horn Island, prior to the teen's death. (Facebook/Abby Blabby- True Crime & News)The Wells family, represented by civil rights attorney Ben Crump, has commissioned an independent autopsy and continues its own parallel investigation.Throughout the investigation, Wells' family has insisted that multiple inconsistencies have emerged since the 18-year-old's disappearance.The Jackson County Sheriff's Department has repeatedly urged patience, saying investigators are examining eyewitness accounts, digital evidence and forensic findings before reaching conclusions. Sheriff John Ledbetter has said officials have not found evidence of foul play but have not ruled out any possibilities.Several inconsistencies have reportedly been noted in the case. Here's a look at some of the information that is raising questions.10 key inconsistencies in the Nolan Wells case1. Did Wells stay behind on Horn Island?What do friends and authorities say? Authorities say several witnesses reported that Wells chose to remain on Horn Island and planned to return later with another group.Local judge Ashlee Cole said her son, Warren, last saw Wells around 3 pm before leaving because their boat developed mechanical problems. Cole said, “Nolan made a decision to stay on the island and return inland later with another group of friends.”Another friend, Tracetin Shepherd, told ABC News Wells had met a young woman and wanted to stay longer. “They met that day and it’s kind of one of those things. He did come off that day that he really did like her, but that was the only time they ever hung out,” Shepherd said.What do Wells' parents say? Wells' parents reject that, characterizing it as risky and uncharacteristic behavior from Wells."We always taught him that if you go with a group, you stay with the group," his father, Elmore Wonsley, told Good Morning America. "If you go with five, you come back with five."They see this narrative as proof of a more significant issue. “When they said that, that automatically just — it turned me off but it turned on a question like, I know he wouldn’t do that. I preached that to him every day … You’re lying to me,” Elmore said.2. Did Wells leave his phone behind?What do friends and authorities say? One of the biggest questions surrounds Wells' cellphone.Shepherd said leaving phones inside boats is common because people do not want them exposed to saltwater. "All our friends are out there. Who are we communicating with?" he told ABC News.What do Wells' parents say? His parents disagree.Christine Wonsley said her son constantly used Snapchat and regularly documented outings with photos and videos. She found it suspicious that his account showed virtually no activity from July 4.They stated it was strange to find that Wells' phone lacked additional texts, pictures, or videos from his outing with pals, which may have provided more insight into his activities that day.Authorities have not publicly explained whether deleted content, metadata or cloud backups have been recovered. Digital forensic examinations of Wells' phone are expected to be conducted jointly by experts for both the family and prosecutors3. Why did the phone's location differ from Snapchat?What do Wells' parents say? According to the reports, family members tracked Wells' phone using a monitoring application with the help of a family friend on the mainland.The family noticed that Nolan's Snapchat account displayed a location that didn't match where his phone was found, and it showed no activity for the 24 hours prior to his disappearance.Rev. Al Sharpton also questioned why Wells' friends never voluntarily told the family they had his phone. "They didn't voluntarily tell her they had his phone. They didn't voluntarily say they had the keys," Sharpton said.What do friends and authorities say? Authorities have not publicly addressed the discrepancy or explained whether it resulted from delayed GPS updates or another technical reason.Read also: Nolan Wells’ parents ‘desperately’ urge public to help find answers, ‘We need to know what happened…’4. What was Wells wearing?What do friends and authorities say? Another discrepancy involves what Wells was wearing.Police reports listed him as wearing black shorts when he disappeared.What do Wells' parents say? However, Christine Wonsley said a young woman who attended the Horn Island gathering later sent photographs showing him wearing blue shorts.5. The alleged argumentWhat do Wells' parents say? A widely circulated video from Horn Island appeared to capture a heated confrontation.Initially, Ben Crump suggested the recording involved Wells.What do friends and authorities say? That claim was later challenged by Shepherd, who told Rolling Stone the person heard shouting was actually him.Crump later clarified that investigators continue receiving tips about possible altercations involving Wells.Investigators have specifically requested original, unedited videos from July 4.6. Who is Katie and where is she?What do friends and authorities say? One of the biggest unanswered questions centerss on a young woman identified only as Katie.During the initial phone call that Wells' friends had with Christine, they told her that Wells stayed back at the island with a girl named Katie. “They said that he wanted to stay and hang out with this girl named Katie. And also, and this was the initial conversation, me being alerted to him being missing.”What do Wells' parents say? According to Wells' mother, she was initially told her son was last seen with Katie and that the young woman herself was also "missing."However, a relative later wrote on Facebook that Katie was never missing.Crump has highlighted another contradiction. According to him, Katie allegedly told investigators Wells said he was returning to his friends' boat. His friends, meanwhile, reportedly claimed Wells told them he was staying with Katie."Which one is it? Somebody must not be telling the truth," Crump said.7. When did Wells actually die?What do friends and authorities say? Investigators have not established the exact time of Wells' death. His body was recovered on July 6 after an extensive search.Jackson County Coroner Bruce Lynd has declined to speculate before receiving autopsy and toxicology findings. The official cause and manner of death therefore remain unknownWhat do Wells' parents say? Crump suggested in a social media repost that Wells might have returned home early on July 5, died later, and then his body returned to Horn Island by July 6.However, other known facts, such as his parents' claims that they were initially informed he was missing and discovered his phone, seem to contradict this timeline.8. Did Wells drown, or was something else involved?What do friends and authorities say? Law enforcement says dangerous rip currents around Horn Island make accidental drowning a realistic possibility.What do Wells' parents say? The Wells family remains unconvinced.Christine Wonsley questioned whether someone would have noticed if her son had entered the water in distress. "We just want to know what happened and why our baby didn't come home," she said during a news conference.9. Was Wells intoxicated?What do friends and authorities say? Photos from the gathering show Wells holding an alcoholic drink.However, Brian Trascher of the United Cajun Navy told PEOPLE his understanding was that Wells' blood alcohol concentration was not at an intoxicated level.The official toxicology report has not yet been released. Meanwhile, two investigations are underway. On Monday, July 13, Ledbetter told ABC News that his department is still working. Crump will carry out a private investigation, including a second autopsy. Neither of the teams has announced autopsy results or an official cause of death.10. Did Wells stay back to ‘chase a girl?’What do friends and authorities say? The United Cajun Navy was assisting in the search for Wells when he went missing, and incident commander Josh Gill had previously told Nola.com that the teen was last seen “hanging out with a girl”. Wells’ friend, Jayvon Williams, who was at Horn Island on July 4, told the Biloxi Sun Herald that he last saw Wells after 4 pm, hanging out with a girl and other friends, adding that both left their phones on the boat that Wells took to the island.What did Wells' family say? Wells’ father, Elmore Wonsley, dismissed the possibility. He said of his son, "He had too much at stake. He had a plan for his life. He knew what he wanted to do. He knew what he had to do come that following Monday, which was to get down to business so he can get his future started. So, for someone to tell me that Nolan decided to stay on the island to chase a girl. No one is going to get me to believe that."