IOWA CITY, Iowa—The lead investigator in the 2018 death of University of Iowa student Mollie Tibbetts expressed confidence Tuesday that the right man was convicted, rejecting defense claims that her abduction could be tied to two other local men. Division of Criminal Investigation agent Trent Vileta said that had they known, detectives searching for Tibbetts in 2018 would have looked into another woman’s claim that she’d been lured by a man from Tibbetts’ small hometown of Brooklyn, Iowa, weeks earlier and held in a nearby home for sex trafficking. But the woman’s complaint did not lead to criminal charges and Vileta said it should be disregarded given the evidence tying illegal immigrant Cristhian Bahena Rivera to Tibbetts’ abduction and stabbing death. Vileta noted that Bahena Rivera partially confessed to stalking Tibbetts while she was out for a run, killing her and dumping her body in a cornfield, where he led …