Here's what I gather happened that night:
The Olympians are drunk, and want to urinate. They tell their taxi driver to pull over. He finds the gas station. They believe a bathroom is behind a locked door, and it is. They can't get anyone to open it, since they can't communicate, or maybe since they're acting like drunk foreigners / entitled superhumans.
They yank the door off its hinges. They don't, however, smash up the bathroom, as the Rio civil police chief Fernando Veloso later claims. Lochte further vandalizes the gas station by loudly yanking a sign off the wall.
Lochte is attracting attention, and security guards show up, flashing security badges. The vandals try to pee behind some bushes and return to the taxi, which is waiting. Guards flash their guns, (possibly) forcing them to exit the taxi. Things get a little tense, since no one can communicate. A good Samaritan, Fernando Deluz, knows good English, and is willing to translate.
The guards don't want them trying to flee again, and force the swimmers to sit. The guards remain concerned that these huge foreigners are going to flee, and have to flash their guns more than once. Lochte gets up, yelling at the armed guards in rapid English, which doesn't help things.
UGA Bulldog Bentz and Longhorn Conger try to pull Lochte down, and calm him. The translator Deluz is also trying to calm Lochte, and get them to slow down their English so he can have time to translate. One of them (Texas-Ex Feigen?) is terrified, and isn't saying anything.
The guards demand compensation for the vandalism. Our "upstanding" Olympians have $20 American and $35 worth of Brazilian money, and pay that. The guards tell translator Deluz that it's enough.
Within an hour, they decide the whole story is hilarious, and quickly start embellishing, especially Lochte on Twitter. Despite being drunk and somewhat confused during the entire ordeal (of their own making), they still have their wallets, credit cards, phones and everything. Therefore, they know more and more B.S. is creeping into the story, but each is telling a different version.
Or something along those lines...