They returned on a subsequent evening and appeared to disprove Albert Einstein's conclusion - that the only way to win on roulette was to pocket the money when the dealer was not looking - by walking out with £1.2m. On the first night they walked out with £100,000. It is understood that the three suspects, two Serbian men aged 38 and 33, and a 32-year-old Hungarian woman, made two visits to the casino earlier this month. The laws which cover gaming date back to the mid 19th century - when the possibility of such sophisticated scams were undreamed of. It is a sign of how untested this area of gambling is that no one can say whether an offence has been committed. Specialised detectives from the Met's serious and organised crime group are working hard to puzzle out how the alleged scam might have worked. Scotland Yard sources yesterday described the case as 'extremely complex'. Two men and a woman were able, it is claimed, to place their bets in the area the computer had pinpointed as the ball's most likely resting place.