Wednesday, Aug. 15
4:15 p.m. — Prior to Christopher Watts' confession, police investigators start a drone search of the oil and gas site where they believed the bodies of Shanann, Bella and Celeste Watts to be located. They spot a bed sheet matching the pattern of several pillow cases and a top sheet recovered from a kitchen trash can in the Watts' home earlier that day. Police also spot "fresh movement of dirt consistent with a clandestine grave near the oil tanks."
Wednesday evening — After two days of investigating, police discover that Christopher Watts was engaged in an affair with a co-worker, according to arrest documents. In an interview with police, Christopher Watts "said he would tell the truth after speaking with his dad," arrest documents say.
11:30 p.m. — Christopher Watts is arrested on suspicion of three first-degree murder charges and three charges of tampering with a deceased human body.
Timeline: Key dates in investigation of deaths of Shanann Watts, 2 daughters in Colorado
Are you saying while the police were investigating NK over those 2 days, she voluntarily contacted them first? It most likely happened that way, she stated in the media interview she approached them on Oct 16, unless there's more to come in the next dump which states the police contacted her first. I understand your reluctance to believe she didn't have good intentions, she did do the right thing by contacting the police before they did.
EDIT:
Hmm, just edited post for PommyMommy's relevant info, so did the FBI make contact first or did she? I'm confused.