WASHINGTON — Federal agents turned off Internet access to three luxury villas at a Las Vegas hotel then impersonated repair technicians to surreptitiously get inside and collect evidence in an investigation of online sports betting, according to defense lawyers challenging the practice. The FBI employed the ruse against the recommendation of an assistant U.S. attorney, Kimberly Frayn, according to lawyers for four of eight men charged in the case. They filed a motion late Tuesday in federal court in Las Vegas …