Long Lost Hero by Jesse Jacobson

Soon after beginning his new job as a police officer, former Navy SEAL John Waingro finds himself involved with two women at the same time. Angela Sims is a fiery, head-strong cop who lives life on the edge of chaos and bends the rules to get what she wants. Susan Petroski is his first love, a beautiful and mysterious woman he thought heíd lost forever. Susan reappears in Waingroís life, rekindling an old flame, but she has a deadly secret. Men from her past are after her–bad men with bad intentions.
Matters become complicated when Waingro and Sims are accused of police misconduct. Sims faces an agonizing career decision. She is offered a deal to save her own job, but it would require her to throw Waingro under the bus.
Waingro must balance his feelings for the two women, save Susan from the men who wish to find her and save his job. Long Lost Hero is a harrowing roller-coaster ride, filled with twists, action and romance.