To his friends, social media followers and even his family John Chau seemed like the ultimate adventurer.
Throughout his teenage years he had developed a passion for the outdoors and would often post snaps from his latest epic trek or travels.
Whether that be hiking along the Pacific Crest in his home country of the US or visiting far flung corners of the globe, John seemed to relish the untrodden path and was always looking for his next extreme vacation.
But what the seemingly carefree young man was hiding from even those closest to him was an increasingly powerful desire to spread Christianity as a missionary.
His final trip saw him visit one of the most isolated tributes on the planet, who had avoided all human interaction for thousands of years - it was a decision that cost him his life.
The 26-year-old was last seen alive by a group of fishermen, who had dropped him off at North Sentinel Island, in a remote corner of the Indian Ocean.
He had told those who carried him to the tiny island, which measures just a few miles long and a few miles wide, that he hoped to make contact with the indigenous Sentinelese tribe and convert them to Christianity.
After a day of waiting in a boat off the shore of the tiny island, only venturing close enough in his kayak to leave gifts, including scissors, a football and fish, in a bid to secure of welcome from the tribe, he finally set foot on the shore.
And what happened next was truly tragic - John was seemingly shot to death with arrows fired by the advancing members of the tribe.
While no one witnessed John's tragic death, fishermen reported when they returned a day after setting off that they saw "a dead person being buried at the shore which from the silhouette of the body, clothing and circumstances appeared to be the body of John Allen Chau".
John was well aware of the warnings surrounding the tribe, they had attacked anyone who had tried to come close to them - even accidentally - by shooting at them or using spears.
But John seemed undeterred by these warnings and set out on his mission, apparently well aware of the risks.
He left his journal he left with fishermen before he went ashore.
His final diary entries before taking his first, and final, steps onto North Sentinel Island reveal he was a young man ready to die for what he believed was his mission in life.
John arrived in Port Blair and remained in what he described as a "safe house" in Port Blair, which is the is the capital city of the Andaman and Nicobar Islands in the Bay of Bengal.
He explained in a diary entry from November 14, 2018: "The benefit of that is that I was essentially in quarantine. I met last night with the fishermen who are all believers and who agreed to drop me off."
John stressed he trusted the men who would take him to North Sentinel Island and revealed his plan was to arrive at the shore at 4am the following morning.
He added: "From there we make progressive contact with fish as gifts over the next few days, then send me off.
"Depending on the darkness, I might land briefly and bury and cache a pelican case for later. We might even send the kayak laden with gifts towards shore."
His next entry was when the boat had arrived at the island but before he had tried to make contact with the remote tribe.
John described in stunning detail "all along the way, our boat was highlighted by bioluminescent plankton - and as fish jumped nearby, we could see them like darting mermaids shimmering along.
"The Milky Way was above and God Himself was shielding us from the coastguard and navy patrols."
It was then that he had his first glimpse at one of the houses on the island, lit by firelight.
By 8:30am John was ready to make contact, piling fish into the kayak and waving at the islanders he had seen the night before.
But when he was still 400 yards from shore he saw some movement on shore and spotted "two armed Sentinelese came rushing out yelling at me".
John added: "They had two arrows each, unstrung, until they got closer. I hollered 'my name is John. I love you and Jesus loves you. Jesus Christ gave me authority to come to you. Here is some fish'."
The young missionary then admitted he "started to panic as I saw them string arrows in their bows".
Desperate he threw the fish towards them in a gesture of welcome but "they kept coming".
His journal says: "I slid the barracuda off. It started to sink but my thoughts were directed toward the fact I was almost in arrow range.
"I backpaddled. When they got the fish, I turned and paddled like I never have in my life, back to the boat.
"I felt some fear but mostly was disappointed they didn't accept me right away. I can now say I've been nearly shot by the Sentinelese and I've walked and cached gear on their island."
But undeterred by what had happened, John stressed he would get some rest before trying to leave some more gifts on the shore.
After watching the fisherman catch two fish, he again loaded these into his kayak and set off for the shore.
Heartbreakingly, John was also carrying "multitools (including one my brother gave as a groomsmen gift that has my name engraved on it)" along with pencils, a first aid kit in case he was shot, picture cards, vitamins, his passport.
He also took his waterproof Bible, along with other gifts for the islanders, including tweezers, safety pins, fishing line, hooks, cordage, rubber tubing and a towel.
As he got closer to the beach, the people on the island shouted at John and he tried to copy their words and shouted back at them.
By now some of the tribe were in the water and heading straight towards him but as they got closer, they dropped their bows and arrows and grabbed their gifts - but there was a violent shock in store.
John wrote: "I paddled after them and exchanged more yells. Here's where this nice meet and greet went south.
"A child and a young woman came behind the two gift receivers with bows drawn. I kept waving my hands to say 'no bows' but they didn't get the memo, I guess.
"By this time the waves had picked up and the kayak was getting near some shallow coral. The islanders saw that and blocked my exit.
"Then the little kid with bow and arrow came down the middle. I figured that this was it, so I preached a bit to them, starting in Genesis and disembarked my kayak to show them that I too have two legs.
"I was inches from [an] unarmed guy (well-built with a round face, yellowish pigment in circles on his cheeks, about 5ft 5") and gave him a bunch of the scissors and gifts.
"Then they took the kayak. Then the little kid shot me with an arrow, directly into my Bible which I was holding in front of my chest."
John managed to grab the arrow at it broke on his Bible and noticed it had a metal head.
He managed to swim and walk his way back through the coral and then had to swim a mile back to the boat, where the fishermen who had brought him this close were still waiting.
John wrote: "LORD is this island Satan's last stronghold where none have even had a chance to hear Your Name?"
Despite being shot at, John was determined to stick to his plan and decided to rest before making a final trip to the island.
His harrowing entry admits he was "scared".
He went on: "Lord, let Your Will be done. If you want me to get actually shot or even killed with an arrow, then so be it.
"To You, God, I give all the glory of whatever happens. I DON'T WANT TO DIE! Would it be wiser to leave and let someone else continue?
"No, I don't think so I'm stuck here anyway without a passport. It almost seems like certain death to stay here, yet there is evidential change in two encounters in a single day.
"Watching the sunset and it's beautiful - crying a bit - wondering if it'll be the last sunset I see before being in the place where the sun never sets. Tearing up a little.
"God, I don't want to die. WHO WILL TAKE MY PLACE IF I DO? OH GOD I miss my parents, my mom and my dad and Brian and Marilyn and Bobby (even though he was just here!) and Christian and someone I can talk to and be understood."
Devastatingly, few of the fishermen spoke English and those who did only knew a smattering of words so the 26-year-old had no one to share his concerns with.
He wrote: "I've never felt this much grief or sorrow before. WHY! Why did a little kid have to shoot me? His high-pitched voice still lingers in my head.
"Now that I think about it, after I got shot by that arrow, I gave it BACK! Man, I should have snapped it.
"Father, forgive him and any of the people on this island who try to kill me, and especially forgive them if they succeed!
"What made them become this defensive and hostile? Why does this beautiful place have so much death?"
John also claimed to have had a vision where the island was bathed in a purple light as a star fell onto it.
And by now, the final plan was settled. John would get of the boat and then the fishermen would sail away so they "wouldn't have to bear witness to my death".
One of the missionary's final entries was a poignant letter to his family.
He made just one more entry into his diary before setting off on his final journey.
John said: "Woke up after a fairly restful sleep, heading to island now. I hope this isn't my last note but if it is: to God be the glory. I'm heading back to the hut I've been to. Praying it goes well."
Following his death, John's family publicly forgave his killer's in an emotional Instagram post.
It said: "He was a beloved son, brother, uncle, and best friend to us.
"To others he was a Christian missionary, a wilderness EMT, an international soccer coach, and a mountaineer.
"He loved God, life, helping those in need, and he had nothing but love for the Sentinelese people."
The Sentinelese have rejected modern civilisation and have no contact with the outside world, despite multiple attempts by Indian authorities, adventurers, fishermen and filmmakers.
Few photographs or videos exist, and it is not even known what they call themselves.
The size of North Sentinel Island's population remains a mystery.
They have killed a number of outsiders who have strayed onto or too close to the island, which belongs to India and is about the size of Manhattan, over the years.
In 2006, two fishermen who strayed too close to the island were killed and their bodies never recovered.
The men had moored their boat near the island to sleep, but they were killed when the boat broke loose and drifted onto the shore.
A tribesman was once pictured firing an arrow at an Indian Coast Guard helicopter.
To protect the tribe, India has passed a law making it illegal to try to contact it or travel within three miles of North Sentinel Island.
