BALTIMORE – A recidivist sex offender received a federal-prison term for committing several child sex abuse crimes. U.S. District Judge Matthew J. Maddox sentenced Patrick Daniel McKernan, 45, of Pasadena, Maryland, to 27 years in prison, followed by lifetime supervised release, for sexually exploiting a child. Kelly O. Hayes, U.S. Attorney for the District of Maryland, announced the sentence with Special Agent in Charge Jimmy Paul, FBI Baltimor…