Michelle Kehoe slashed sons ' throats , left them for dead , tried to kill herself , prosecutor says . Iowa jury hears tape of surviving boy telling police his mother cut him , hurt brother . Prosecutors say Kehoe hatched plan month before to blame attacks on stranger . Score: 7
Michelle Kehoe slashed sons ' throats , left them for dead , tried to kill herself , prosecutor says . Iowa jury hears tape of surviving boy telling police his mother cut him , hurt brother . Prosecutors say Kehoe hatched plan month before to blame attacks on stranger . Kehoe 's lawyers have filed a notice of intent to present an insanity defense .