Sometimes a bad law may become good. Anti dowry act is most abused law and every girl's father with a vindictive attitude and scores to settle wants to use this.
But if Arjun Singh can be sent behind bars for a few years due to this law, I willingly support continuation of law for a few more years.
Secondly, would Mayawati have decided to involve CBI if her own minister was involved. It is more like a gift to Singh. "We are handing the case to your own CBI now whatever happens is your responsibility"