Whats the ruleing on this?

[steelcmg]

Im kinda new to playing home tourneys and this past weekend i was at a 20 player 30$ buy in tourney and with like 6 people left there was a guy that had KK and bet before the flop and another guy with A8s (BB) called (the amount of chips really doesnt matter.) The flop came and the guy with A8s checked since its was a bunch of rags. The KK guy went all in and the dealer wasnt paying attention and thought he just checked and showed the next card. The card was an A so needless to say The A8 guy who was goin fold called.

what is the ruleing on this burn the A and throw the next card? Beat the hell out the dealer if ur the guy with KK or split the pot? Or what else could have been done?