My daughter is 8 years old; the same age as Tommys. If my daughter came to tell me that a man had just grabbed her bum in the swimming pool, my first thought would not be to get my phone out to interview her.
My guess is that he started a fight with some asian guy, realised afterwards that he could end up back inside and therefore decided to make up a story to try and cover himself.
The guy is an arsehole.