Delegate Robert A. McKee, chairman of the General Assembly's western Maryland delegation, resigned Friday, saying in a statement that he has "entered treatment" after investigators searched his home during a child pornography investigation. The FBI's cyber crimes unit is helping Washington County authorities in analyzing materials seized from McKee's home near Hagerstown, an FBI spokesman said Friday. The cyber crimes unit investigates computer crimes including malicious hacking, child pornography and Internet fraud. "For me, this is deeply embarrassing," McKee said in a statement faxed to news organizations. "It reflects poorly on my service to the community as a state delegate...