A petty thief and a pizza deliveryman are gunned down in an alley. A US Congressman's assistant falls in front of a subway train - three seemingly unrelated deaths. The dead assistant was the chief researcher for Congressman Stephen Collins, spearheading hearings into the role of private security firm PointCorp. She was also his lover. Cal McAffrey, a rumpled, old-school metro reporter at the Washington Globe is covering the first story. He was Collins'...