Shootout with the Twin Killers

This is the concluding story of Agent Margaret Crawford and her pursuit of the Twin Killer. She has risen thru the ranks into a role of leadership at the FBI., but has never forgotten the one that got away. Her role as mother, wife and agent is daunting but she is one superwoman. Now once again T.K. has struck after a break of five years. Strangely this time his choice of victims is slightly different. Can she and her husband solve the twisted path of clues to the identity of this slayer of innocents?