Before the authorities took action against NKF/Durai & Kong Hee, there were numerous complaints but they never acted on information received. If acted, they found nothing. When they finally acted, all parties weren't strangers to the cheng hu.
In the case of this monk, unless someone had complained against him in the past, or for one reason or another through means available, he attracted security attention, no one would know who he is. Thousands of monks around. Case is also civil in nature. Not a criminal one otherwise DPP would be prosecuting the case. Most likely CAD/Police would have classified case as "Breach of Contract' - 'victim' advised to take up civil suit.