The study found that between July 1, 2005, and December 31, 2005 (period before enactment of Act 166), there were 6,331 arrests for CDV. During the 6-month period after passage of Act 166, there were 6,512 arrests for CDV, a 2.86-percent increase in the number of arrests after the passage of the Act. Just over 75 percent of the arrest offenses, 81.1 percent before and 78.6 percent after passage of the Act, were for first-degree CDV. Based on the analysis of this data, the study concludes that there has been no unintended consequence of CDV charges being changed to other offenses in order to avoid the sanctions associated with the new legislation. The behavior of law enforcement officers in making CDV arrests apparently did not change as a result of the legislation. Based on the study limitations cited in this report, however, it advises that the conclusion should not be regarded as the definitive answer to concerns about the legislation's impact. It recommends several other analytical approaches that should be considered for future studies. Act 166 increases the amount of the fine for CDV as well as the amount of time to be served in custody. It also requires treatment for first-time offenders and training for the judiciary. 7 tables and appended text of Act 166