Cold hearts
(Book)

Series name and number from Goodreads.

"If only it had been something else that brought Lissa Sherman and Mack Jackson back in touch after so many years. Something--anything--other than the murder of Mack's father. Even worse, Lissa's car had been used as the murder weapon. Thirty-five years ago, four friends went out joyriding and ended up in a terrible accident that left one dead and the others with no memory of that awful night. Now two more people, including Mack's father, have been murdered, and if the lone survivor knows why they're being targeted, she's not talking. Even as Lissa and Mack find themselves drawn together in the midst of tragedy, the mystery deepens when someone comes after Lissa, too. Is the danger to her tied to the other deaths, or are two killers at work in town? Now Mack has to fight an unknown attacker as well as his feelings for Lissa, but it may be that he can't win either battle" -- provided by publisher.