I've played roulette for the past 2 years at several casinos in the US and you can still place bets after the ball is released. Once the wheel starts to slow do

I've played roulette for the past 2 years at several casinos in the US and you can still place bets after the ball is released. Once the wheel starts to slow down and before the ball drops onto the wheel, the dealer will signal no more bets.