A security guard at an Atlanta apartment complex for seniors and people with disabilities was arrested last week and charged with stabbing a 90-year-old resident more than 50 times last month.

Chun Ki Kim was found dead on his kitchen floor of his fifth floor apartment on September 25, stabbed in the torso and face, the Atlanta Journal-Constitution reported. The security guard, Janet Denise Williams, was on the scene as detectives investigated the scene, asking questions and even going inside another resident’s apartment who had installed a doorbell camera.

“While it was still unclear what her intentions initially were, Williams stabbed Mr. Kim to death,” a warrant for her arrest said.

According to the affidavit, the building, owned by the Atlanta Housing Authority, has security cameras, but none that would show someone entering or leaving a unit. The only items missing from Kim’s apartment were his wallet and an Atlanta Braves baseball cap.

Kim’s caretaker called police just after 7:30 a.m. on September 25 after finding the body.

Available surveillance footage showed Kim, who operated a shoe repair shop before his retirement, entering an elevator to go to his floor at about noon the day before. Williams was seen taking the elevator at about 3:15 p.m. that afternoon. Six minutes later, she got back onto the elevator without the glasses or face mask she had been wearing, the court document says. Additionally, her pants leg appeared torn and wet with a dark, reddish stain.

The warrant said she was seen looking at the back of her hand and her pants and seemed stressed.

“The red Xfinity bag she was carrying also appeared to be fuller as if something had been placed inside during that time,” according to the warrant. “Williams got off the elevator with a noticeable limp.”

Williams went back to her security desk after using the lobby bathroom, the document says. She made two more trips to the fifth floor.

The affidavit says that officers executed a search warrant at Williams’ home in DeKalb County on October 3 and took her security guard uniform, shoes and the Xfinity bag into evidence. Officers noted that her uniform pants had been sewn back together, and Williams said she had repaired it but didn’t recall how the pants were damaged.

The warrant says that Williams had a large wound on her thigh, which she blamed on an accident while opening a garage door.

On the day Kim’s body was found, family members came to the building crying and said Williams hugged them and tried to comfort them. One family member said she told them, “Your father was such a wonderful person and I don’t know why this happened.”

Williams was employed by Protect Security, which is contracted by a property management company, the Atlanta Housing Authority told the Journal-Constitution.

Williams has been charged with one count of murder and was ordered held without bond. Her next court appearance is set for November 4.

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[Featured image: Janet Denise Williams/Fulton County Sheriff’s Office]