So this is an estimated late night timeline based on the NBC article-
3:00AM: Brittany, Tyler and friend take Uber back to Hilton.
3:05AM: Brittany, Tyler and friend arrive at Hilton.
3:10AM: Confused (drunk?) Tyler walks off from Hilton, friend goes with him. Brittany goes to hotel room to charge phone.
3:20AM: Brittany goes back down to hotel entrance, doesn't see anyone.
3:30AM: Tyler calls Brittany, says he will be right back.
3:35AM: friend returns to Hilton alone. Says Tyler will return shortly (can't be far away then). A car is not mentioned, so Brittany's story is that the friend walked back to the hotel, the same way he left the hotel 25 minutes earlier.
3:40-4:10AM: Brittany tries to call Tyler, no answer.
4:10AM: Tyler calls Brittany, ‘I see the hotel. I’m walking through the woods. I’ll be right there."
4:11AM: Tyler calls right back, "there was an open line for about four seconds. Then the phone hung up."
4:12AM: Brittany calls Tyler back, but "his phone was off. And it’s been off ever since.”
4:30AM: Friend leaves Brittany and goes home.
Soon after Brittany begins calling friends about Tyler not returning.
Attached is an image of the Hilton, which has a main entrance in a large courthouse. Most Uber drivers would drop passengers here, although there is another entrance in the upper left of the image that is probably opened by hotel keys. Either way, there are cameras there, moreso in the main courthouse entrance.
Security cameras will back up or dispel this timeline and events. There are also phone records of the calls. I will assume what is said in the article is accurate, otherwise we have a guilty party describing the events, which goes down a different path, and I don't believe is true based on lack of LE activity.
The friend was last to see Tyler alive, and says Tyler will be right back. This suggests that Tyler was not lost,
and was close to the hotel. Why would the friend leave him and return alone?
This is 30 minutes before Tyler's last phone call. Why the 30 minute delay between when he expected to return and makes his last call?
Tyler is OK after the friend leaves him because he makes a phone call to Brittany 30 minutes later.
Tyler made a call at 4:11AM and then the phone was turned off. Maybe he butt dialed, and turned the phone off instead of ending the call, as he was "drunk". The content of the 4:10AM call to Brittany suggests that Tyler was OK at that point, although maybe heavily under the influence of something.
Pretty tough to figure out what happened, but I suspect the friend saw Tyler again after he left the hotel at 4:30AM...
Young father Tyler Davis missing from Ohio shopping complex since February
Brittany told Dateline nothing was out of ordinary that evening. But by the time they had walked around the sprawling shopping complex –- which includes no fewer than 235 retail stores, 40 restaurants and 750 residential units, according to its website –- it was around 3:00 a.m. and everyone was exhausted. They took an Uber back to the hotel. Brittany said that’s when the night began to change.
“When we were getting out of the Uber, Tyler seemed so confused and frustrated,” Brittany told Dateline. “He said he was going to go for a walk.”
Brittany said she offered to go with him, but her phone was dying so their friend went with Tyler, instead, while Brittany went to the hotel room to charge her phone. She went back outside a couple of minutes later, she said, but couldn’t find her husband or their friend.
“I was kind of confused, like, ‘What’s going on?’” she said. “Then Tyler called me around 3:30 a.m. and said he would be right back [to the hotel].”
A few minutes later, the couple’s friend returned to the hotel. Tyler was not with him.
“He said Tyler would be right back, too. But I kept trying to call Tyler and he wouldn’t answer,” Brittany said. Brittany added that their friend had seen Tyler on the walk, but she was unclear why, or at what point, they had separated.
Around 4:10 a.m., about one hour after Tyler had left for the walk, Brittany’s phone rang. It was Tyler.
“He called and said, ‘I see the hotel. I’m walking through the woods. I’ll be right there.’” Brittany said. “He sounded so confused. And he is not an outdoorsy person at all. There could be two trees right beside each other and he would call that ‘woods.’”
Seconds later, Brittany’s phone rang again. It was Tyler.
“I answered it and there was an open line for about four seconds. Then the phone hung up,” Brittany said. “I called him back and his phone was off. And it’s been off ever since.”
Brittany told Dateline it was nearing 4:30 a.m. at this point. Their friend, who Brittany says lives just 10 minutes from the hotel, decided to go home. Brittany told Dateline she “didn’t have a good feeling” about her husband’s safety and began calling friends to ask for advice on what to do. According to Brittany, her friends reassured her that nothing was wrong and Tyler was probably going to walk through the door at any moment. But as the sun began to rise, Brittany grew more concerned. 
