A tenant accused of murdering and dismembering her landlady allegedly tried to also kill a neighbour earlier this year.
Sandra Kolalou, 36, is said to have cornered a resident at the same Chicago boarding house, knocked her to the ground and tried to choke her by shoving the asthmatic woman's inhaler down her throat.
She allegedly sung: "I'm a doctor, I can kill you. I'm a doctor, I can help you."
