Mealey's (October 15, 2019, 1:09 PM EDT) -- DENVER — An expert witness for the federal government can testify about how child sex abusers “groom” their victims to gain their trust and how the behavior can lead victims to delay disclosure of a sexual assault, a Colorado federal judge held Oct. 11 in mostly denying a defendant’s bid to exclude the testimony from his trial (United States v. Dakota Michael Heller, No. 19-cr-00224, D. Colo., 2019 U.S. Dist. LEXIS 177602)....