MANDAN — A Mandan mother is accused of using a kitchen knife to cut the throats of her three young children, killing two of them and seriously injuring the third. Kailey Erhart, 22, of Mandan, was booked into the Burleigh Morton Detention Center shortly before 11 p.m. Thursday by city police. A view of 1205 South Frontier Trail in Mandan, where law enforcement say a mother seriously assaulted three of her young children, two of whom died. A police affidavit states that officers found all three children on a bed, and that all of them had suffered neck wounds. The father also told officers that Erhart had recently bought a handgun — which officers recovered from the home, according to the affidavit.