a few days later, corporal ronnie gaskins got a big surprise.chel wanted to meet at her lawyer's office. she had something she wanted to say. >> take us inside that attorney's office with rachel. what was her demeanor? >> i remember her pulling up the waist basket next to her. chef was afraid she was going to throw up. >> we started asking her the questions that we thought she would answer. did she overdose at a party? i remember her face got really red. she glanced at us and said, we stabbed her. >> was there just a hush in the room? how did everyone react? >> everyone was silent for a couple of minutes. we were speechless. >> it wasn't an accident. it was a murder. and not only had rachel and sheila killed skylar, they had planned it for months. all the while looking and acting like best friends. as part of the plan, rachel and sheila settled on the night of july 5th as the ideal time to kill skylar. >> earlier that day, rachel had obtained the shovel from her father's residence, put it in sheila's trunk, brought the clean clothes, cleaning su