Lindsey Nicole BlansettSumner County report â€” Sumner County District Court Judge Scott McQuin has ruled that Lindsey Nicole BlansettÂ is fit to stand trial for the murder of her 10-year-old son.McQuin has ruled that Blansett understood the nature of her arrest after she heard testimony in a closed hearing last week from a Larned State Hospital psychologist. Blansett had a mental competency exam in early April.On Thursday, Blansett also waived her right to a preliminary hearing for the first degree murder charges levied against her. A judge determines if there is enough evidence to try the defendant in the preliminary hearing.Sumner County Attorney Kerwin Spencer told Kansas.com that he has filed an additional charge of aggravated assault, against the 33-year-old divorced mother of two. The court alleges Caleb was aware he was in danger before the attack, Spencer said.Blansett is next due in court at 1:30 p.m., May 28 for a hearing called an arraignment where she will plead guilty or not guilty to the charges.Blansett has been charged with first degree murder of Caleb Blansett, a 10-year-old Lincoln Elementary student in Wellington. She is accused of using a rock and knife multiple times leading to his death.