A 44-year-old serial rapist who spiked his victims' drinks with sleeping pills in an unprecedented date rape case, was expressionless as he was sentenced to 371/2 years' jail on Tuesday. Azuar Ahamad, dubbed by a prosecutor as "the worst serial rapist ever to be dealt with in Singapore", was also ordered to be given 24 strokes of the cane. Azuar committed various sexual offences against 22 women in 2008 and 2009 after getting to know them online. In 2012, he pleaded guilty to raping three women and sexually assaulting a fourth. He met them for drinks at nightspots and violated them in hotels and in one case, in the victim's home. The women could not remember what happened after drinking alcoholic shots he bought for them.