There have been too many instances lately of pilots turning up for flights smelling of alcohol and these have been helthily debated on this site.
However, I can't seem to remember an occasion when a pilot has been arrested on suspicion of being over the limit for an evening flight, all the ones I can remember have been the 1st flight of the day.
Any pilot who turns up for an evening flight smelling of alcohol has either had one hell of a drinking session the night before or has bee totally irresponsible and neglectful of his duties by having had drinks in the afternoon prior to the flight.
I sincerely hope that these allegations are proved to be false but the fact remains that drinking and flying, like drinking and driving is something to be frowned upon and discouraged.