Someone got fired

So yesterday , a great coworker of mine got fired for supposedly ‘ giving out a free drink’ and when our D/M came in as well as our S/M sat down and talk to her, and fired her on the spot. As far as I know, if this actually happened it was her first time doing it, to spot a person this one time and she confirmed it, but only if the dink was cheap enough. When this happened, it came out of no where, no warnings, no write ups, nothing. I don’t even think they’ve shown any video evidence to prove it as well as not shown her too. Opinion anyone?