This was done very well. It started off with her father investigating the older murder and then committing suicide when he found evidence of his son’s guilt. He loses the evidence and no one is ever prosecuted.

Then it is the present day and Rachel is a cop and Billy a teacher’s aide in the town’s school for the blind and other handicapped kids. The teacher he aides for is the first one killed. Then her sister and her sister’s boyfriend also disappear. They disappear the night that the sister, Claire, is found. The way she is found is unreal. She is nude, crawling out of the woods. Her eyes, ears and mouth have been sewn shut. One arm has also been sewn across her chest so she has to crawl on one hand. She’s been doped with Thorazine that is the only drug that will counteract epinephrine. Why?? Because her father is on duty at the ER and will undoubtedly misdiagnose her struggle to breath, as an asthma attack and he will give the requisite epinephrine. She dies because her father is incompetent.

Then Nicole and Dinger disappear. Because Claire was held 3 weeks before being found, Rachel turns up the heat to find the two missing kids. Especially since when they cut the sutures off Claire’s balled up fist, Nicole’s necklace (Dinger’s class ring on a chain) was inside.

It turns out to be a nearly blind and deaf owner of a dry cleaner’s store that is the killer. Rachel had interviewed him in connection with Dinger’s disappearance since he employed the teenager. Little did she know that Dinger and Nicole were 3 stories above her in a sound proofed room. The dry cleaner had been misdiagnosed by Nicole and Claire’s father when he was a baby. Instead of treating the meningitis he actually had, the doctor treated him for flu. As a result, the baby lost most of his sight and hearing and some of the use of one arm. Thus the state Claire was found in. His parents degenerated into freaks after the ‘settlement’ of $10K and the kid was abused constantly.

So that just left the old murder unsolved. Just as the rest of the police are figuring to pin it on the dry cleaner, Rachel confronts her brother. He has fit the profile all along and she harbors the same suspicion as her father. Way back then, some cats were found decapitated and hanging from trees. One of them was the murdered girl’s cat. A bell from a collar was found at the site so he knew they weren’t all strays. Billy had the bell. He decapitated the cats. And he was out joyriding with the rest of the kids who picked up the girl and teased her for a while before letting her go along a deserted stretch of road. When they found her, the friendship bracelet she always wore was missing. When Billy ran, he left it for Rachel to find in a bunch of old photos and other family memorabilia.