Murderous Intent — K.J. Dahlen

When U.S. Marshal Lola Kane needs help with a witness, retired Marshal Boone Sheridan comes to her aid. Getting the witness, Faith Kessler, back to New York and outrunning several attempts to stop them Boone gets drawn back into the Marshals. Case Ewing wants Faith dead but not before he wants their son back. Faith has evidence that hit man Felix Harley needs to recover, but Felix has a personal reason to want Faith dead. She killed his brother when she made her escape. Felix is good but Boone is better and it's a race to see which one will prevail.