On October 12, 2019, 43-year-old Tsvetanka Kostadinova was killed in a shooting in Chicago. The shooter, 66-year-old Krysztof Marek, entered Kostadinova’s apartment while she was having dinner with her husband, 43-year-old Ivaylo Popov, Popov’s mother, 65-year-old Iskra Pourel-Popova, and her boyfriend, 61-year-old David Hanik. Marek allegedly fired numerous shots from a .40 caliber firearm, killing all four people at the dinner table.

Marek then went to a second apartment upstairs and shot 53-year-old Jolanta Topolska in the abdomen. As she tried to flee, Marek followed and shot her again in the back of the head, killing her. Marek was arrested at the scene and later charged with five counts of first-degree murder. Investigators found multiple letters in Marek’s condo, written in Polish, expressing grievances with neighbors; the motive remains unclear. A Criminal Court Judge described Marek as evil on steroids and ordered him held without bail.

Neighbors later recalled previous confrontations with Marek but said the neighborhood was generally quiet before the attack. If anyone knew Kostadinova or has information about that evening, please share what might help the investigation.