Foxx faces criticism from opponent over deadly Wicker Park Walgreens stabbing of Olga Calderon

CHICAGO (WLS) -- Cook County State's Attorney Kim Foxx is facing criticism from her opponent over a deadly stabbing at a Wicker Park Walgreens.

Sincere Williams, 18, allegedly stabbed 32-year-old Olga Calderon to death one week ago, according to Chicago Police.

RELATED: Walgreens stabbing: Man, 18, charged with murder after mother working at Wicker Park store stabbed to death, police say

An 18-year-old man grabbed Walgreens employee Olga Calderon by the neck as she stocked shelves and stabbed her multiple times, police said.

Police believe he's also responsible for other crimes in the area.

At an event on Sunday, Judge Pat O'Brien said Williams' criminal history should have prevented him from being out on the streets.

WATCH: Chicago police announce charges, new details on motive behind stabbing

Chicago Police Department released new details on motive behind stabbing death of Wicker Park Walgreen's employee Olga Calderon.

O'Brien referenced a report from the Chicago Tribune, claiming that Williams' was charged last May with a violent break-in and theft of guns from a suburban gun shop, but was released from electronic monitoring in that case just days before Calderon's murder.

O'Brien said that decision to remove the monitoring device came with no objection from Foxx.

"They apparently thought it was a good idea to release this man into the community unsupervised. And this is not the only time that Ms. Foxx has failed to protect the community, the victims, and a victim like Ms. Calderon in specific," O'Brien said.

WATCH: Police investigate murder at Wicker Park Walgreens

Chicago police investigate after a 32-year-old woman working at a Walgreens in Wicker Park was stabbed to death Sunday morning.

ABC7 has reached out to Foxx's office for comment but have yet to hear back.

Williams has been charged with first-degree murder in the slaying of Calderon.

WATCH: Police describe suspect in at Wicker Park Walgreens stabbing

Chicago police discuss their investigation into a fatal stabbing at a Walgreens store in Wicker Park Sunday morning.