State Police of Greenwich arrested Damian J. Waterman, 28, of Cambridge for Promoting a Sexual Performance by a Child, and Criminal Possession of a Sexual Performance by a Child. Waterman is accused of possessing and promoting images consistent with child sexual exploitation via a mobile device. His arrest followed an investigation and the execution of a search warrant on his home this week. The investigation stemmed from a cyber tip received through the National Center for Missing and Exploited Children.