Her Cop Protector (Harlequin Super Romance Book 1990)

One hot Miami mystery 

Homicide detective Dean Hammer has two dead bodies on his hands and just one connection: a pretty activist named June Latham. She swears her only concern is rescuing the tropical birds she loves, but something isn't adding up. As Dean begins to unravel the mystery of June's troubled family, he realizes she's in danger. 

But that's not all. Dean's hotter for June than even the sweltering Miami weather can explain. Now if only she would put aside their differences and let him protect her… Otherwise she'll be next in the sniper's scope.