One of Skylar's closest friends - 16-year-old Rachel Shoaf - has pleaded guilty to second-degree murder, telling a judge she stabbed the victim in a remote part of Wayne Township, Pa.
Shoaf admitted planning the murder with another girl who hasn't been identified because her case remains in juvenile court. Skylar Neese was an honors student at University High School, and her father said the three girls were close.
But Shoaf, police and prosecutors have all refused to offer a motive for the attack.
Dave Neese said Shoaf has told authorities the girls didn't want to be friends with his daughter anymore, but he knows there's more to it than that. He has more questions than answers.
At her plea hearing last month, Shoaf admitted only that she and the other suspect drove the victim to a secluded spot on a gravel road in Pennsylvania - just minutes from the unincorporated West Virginia community of Macdale - and stabbed Skylar to death at an agreed-upon moment.
They tried to bury her but hid her body under branches when they couldn't.
On Sunday, the family put a long wooden bench at the site, which sits in the woods just off a gravel road leading to a remote coal mine portal. An oversized photo of the smiling brunette stands inside a heart-shaped ring of white-painted rocks. Silk flowers, colorful butterflies and a cross painted to look as if it's been tie-dyed stood nearby Monday afternoon, a few pink balloons caught in the tree limbs above.
The cold calculation and brutality of the plot shocked a small town already frustrated by the slow pace and secrecy surrounding the case. Investigators have said nothing publicly about the case since announcing the charges against Shoaf on May 1.
Prosecutors say in the court documents they plan to recommend a 20-year prison sentence and will oppose any move to have Shoaf sentenced as a juvenile. But she could get as many as 40 years under the law.
Shoaf's family issued a public apology but has made no further statements.