Slain patients ranged in age from 78 to 98 , district attorney says . Was also among those treated at nursing home in hospital . Man suspected of carrying out robbery was shot ; cause unknown , police say . Police officer also died in hospital .
Slain patients ranged in age from 78 to 98 , district attorney says . Nurse also among those killed at nursing home in Carthage . Man suspected of carrying out attack was shot ; condition unknown , police say . Police officer also wounded in shooting .