A man whose condo association was trying to evict him for not paying his mortgage and association fees taped a note inside his front door that said, "No mercy!!!" He showed none, prosecutors said. Krysztof Marek, 66, now faces five counts of first-degree murder, the Tribune reports. Marek burst through the door of the apartment above his about 5:30pm Saturday, prosecutors said, and shot four people as they sat down to dinner. He then went up another floor, they said, where a woman sat on her couch, the door unlocked, as her son stepped onto the balcony to see what the disturbance was. Marek shot her once before she went out the back door and down a flight of stairs, per the Sun-Times. He followed the trail of blood, officials said, found her, and shot her again in the back of the head.
Marek returned to his apartment, put the gun down in the living room, then walked outside. "I think you’re looking for me," police said he told them. "I did it." A retired truck driver with three grown children, Marek had lived in the building for years and had once been president of the condo association. He reported a large drop in income in a bankruptcy filing in 2017. Police reported finding letters in his condo about his issues with neighbors, who said he'd been acting unstable, as well as two ominous notes written in Polish. "Tomorrow!! No Mercy. Without any stupid hesitation!!!" one said. Both refer to what is being done to him, with the other one ending, "They have to pay for it!!" (Read more mass shootings stories.)