The assault occurred last Friday around 10:30 a.m., according to police. The woman was home alone when a man entered her apartment, stole items and sexually assaulted her at gunpoint.

The owner of the apartment building, who spoke on condition of anonymity, said surveillance cameras he had installed for security captured the man walking through the back alley, bumping a gate as it closed, and entering the rental complex through an unlocked back door. The video shows the man spending more than half an hour inside the building, going through rooms and taking handguns, a game console and cell phones before the assault, the owner said.

The landlord said the victim's fiancé called him after the attack, and the group made multiple 911 calls. They waited for hours for police to arrive. The victim was taken to a hospital around 1 p.m., but it was another hour before an officer was assigned to meet with her. Officers did not arrive at the building until nearly 4 p.m., more than five hours after the crime began, according to the owner's account.

Police released an image of the suspect from the surveillance video on Sunday. On Tuesday morning, the department confirmed detectives were speaking with a person of interest. No charges had been announced as of Tuesday, and police did not provide further details.

The case has drawn attention to the response time and to the circumstances that allowed the assailant to enter the building. The landlord said the back door was unlocked, and the surveillance footage shows the man moving through the building for an extended period before the assault.

Auburn Gresham, on Chicago's South Side, is a community where residents have long called for more resources and faster emergency responses. The attack has left neighbors shaken and raised questions about how a single unlocked door and a delayed police response could leave a woman vulnerable in her own home.

Police are asking anyone with information to contact detectives. The investigation remains ongoing.