Chicago police charged a woman with murder after they discovered her landlord’s remains inside a freezer in their home Monday, officials announced Wednesday. 

Tenants reported their landlord, Frances Walker, 69, missing on Monday after they hadn’t seen her in over a day and heard a loud scream around 2 a.m. local time. Walker lived on the first floor of her two-story home and rented out its rooms to tenants, police said. When police were called to the home Monday evening, they discovered dismembered remains inside a freezer, police said. 

A person of interest was immediately clear, police said. Sandra Kolalou, 36, lived on the first floor with Walker and refused to talk to police when they arrived at the residence to investigate Walker’s disappearance, police said. The other tenants had reported being afraid of Kolalou in the past for showing aggressive behavior, police said. 

Kolalou left the residence in a tow truck she ordered to tow her car from another location while police investigated the residence for the missing Walker. 

Tenants were “afraid for” the tow truck driver so they exchanged numbers with him before he left with Kolalou, police said. The tow truck driver informed the tenants that Kolalou had him drive her to a nearby beach where she deposited a large plastic bag in a garbage can. 

Detectives went to that location to retrieve the can, where they found bloody rags, police said. The driver also told tenants that Kolalou threatened him with a knife.

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“Due to the communication between the tow truck driver and the tenants, officers were able to get to that scene immediately and place the defendant in custody for pulling a knife on the tow truck driver,” Chicago Police Chief of Detectives Brendan Deenihan said at a press conference Wednesday.