Abstract: | Abstract Part of the data gathering and analysis in any parenting time evaluation involves investigation into sources of information that provide a factual basis for measuring key factors. However, this investigative function of the child custody evaluator has not been systematically described. In this article, investigative data collection is discussed in terms of holding a discriminating and skeptical eye in reviewing sources of information. The need to conduct forensic “detective work” and factfinding is discussed. The importance of the investigative mindset for the evaluator is to increase the completeness and accuracy of measurement of key variables, which increases the validity and accuracy of predictions on child developmental outcomes for the court. |