Missing, Nikki Boyd Files Series by Lisa Harris and published by Revell.
Nikki Boyd isn't usually called in on homicides; her forte is missing persons. But when a case with two murdered and two missing pops up on a quiet suburban street, she's ready to start the investigation and find missing homeowners Mac and Lucy Hudson. When the first clues lead her to the boat of her friend Tyler Grant--and another dead body--Nikki must untangle what ties Tyler to the Hudsons. The clues pull her into a deadly maze of counterfeit drugs and a killer who will stop at nothing to silence anyone who threatens his business--including Nikki.