 Lhermitte told investigators that , when she returned , she hid the knives in a drawer and called over her youngest daughter Mina while the other children were watching Spy Kids 3 . Lhermitte tried to strangle Mina , but when the child struggled Lhermitte resorted to slashing her throat with one of the stolen knives , all while speaking comforting words and apologizing to the child . Medhi was the next to be killed , the youngest and the only son . When her attempts to strangle her child again failed , Lhermitte cut Medhi 's throat and washed the knife afterward in the bathroom sink . 
