Trusting the Enemy by Sharon Hartley

He can clear her name - if she can trust him.

Patrol officer Patrice Skinner is still reeling from the death of her lieutenant boyfriend when internal affairs detective Monroe DiSilva starts asking questions - ones that paint Trice as a suspect. When another man with ties to Trice turns up dead, cooperating with DiSilva feels as inevitable as the growing attraction between them. Trice knows her truth, but with danger closing in, she'll have to trust DiSilva, or the next dead body might be hers.