The vehicle belonging to a mother of two children who all disappeared about 20 years ago was pulled out the Ohio River, said the Delhi Township Police Department. Officials this week confirmed that a bone was found inside. Stephanie Van Nguyen and her young children, John and Kristina, vanished in 2002 in the Cincinnati suburb of Delhi, said police in a Facebook post last week. The woman was traveling in a 1997 Nissan Pathfinder with Ohio plates, according to an Ohio Attorney General’s Office missing person report on her case. Her case was investigated but went cold. “Nguyen left a note that she was going to drive into the Ohio River,” Delhi Police said in the post. Her vehicle wasn’t ever located. The Indiana State Police confirmed on Monday that a bone found in the vehicle is believed to be of human origin, and it was sent to a crime lab …