Dark Angel by D.K. Hood

In the dark pine forest surrounding the quiet town of Rattlesnake Creek, the body of a young girl lies on the ground. Her angelic blonde hair spills over her shoulders and her unblinking eyes stare up toward the sky…
It was Beth Katz’s serial killer father who made her like she is: a successful FBI agent and an unstoppable vigilante dedicated to hunting down murderers who have evaded capture. Beth will push herself to the limits to deliver justice. Even if it means killing those who deserve to die.
When the body of missing schoolgirl Brooklyn Daniels is discovered in a secluded patch of woodland on the outskirts of town, Beth and her partner Dax Styles race to the scene. Brooklyn and her best friend left home to pick wildflowers a week ago and vanished without trace.
Taking in Brooklyn’s body carefully laid on a blanket and the dress neatly folded next to her, Beth suddenly freezes. She’s seen this before: in the files of a cold case. The perpetrator takes two girls—one vanishes, the other is killed and left with her clothes beside her. Now Beth knows she has a twisted serial killer on her hands, she’ll stop at nothing to catch him. Even if it means going against Dax’s orders…
Desperate to find the other missing girl, Beth’s heart pounds as she puts herself up as bait and walks into the secluded forest, knowing evil is lurking nearby. With Dax watching her every move, Beth prays the gamble pays off. Can she outsmart the murderer, or did she just walk into a trap? And when Beth finally comes face to face with the killer, will she hand him over or serve justice of her very own?