The Guardian by Dee Henderson

A federal judge has been murdered. There is only one witness, and an assassin wants her dead. U.S. Marshall Marcus O'Malley thought he knew the risks of the assignment . . . but he was wrong.

Introducing the O'Malleys, an inspirational group of seven, all abandoned or orphaned as teens, who have made the choice to become a loyal and committed family. They have chosen their own surname, O'Malley, and have stood by each other through moments of joy and heartache. Their stories are told in CBA best-selling, inspirational romantic suspense novels that rock your heart and restore strength and hope to your spirit.