Best Friends to Killers: Teens Murder Friend Because They 'Didn't Like Her'

Best friends and high school sophomores Skylar Neese, Shelia Eddy and Rachel Shoaf were inseparable.

Living in Morgantown, West Virginia, the 16-year-olds were pretty and sociable, taking selfies and spending time together.

But everything changed on July 6, 2012, when Neese’s parents discovered she was missing. Six months later, Shoaf told authorites that she and Eddy had stabbed their best friend Neese to death.

At 16, Skyler Neese was thriving, according to her parents. Neese had a 4.0 grade point average, a part-time job at a fast food restaurant and an active social life.

She was Dave and Mary Neese’s only child.

“Skylar was a very bubbly person,” Dave Neese told ABC News’ “20/20.” “She was also very loyal to her friends, the people she thought was her friends.”

Skylar Neese met her best friend Shelia Eddy at age 8.

“She was like a part of our family. She really was,” Dave Neese said. “I mean, just like one of our kids.”

While entering her freshman year in high school in September 2010, Eddy met Rachel Shoaf. The next month Eddy transferred to the same high school as Skylar Neese, and Shoaf also soon became friends with Skylar Neese.

Before long the three teens began to argue among themselves.