A masked man walked into the store and currency exchange about 7 p.m. Saturday on the city's southwest side, displayed a handgun and announced a robbery to an employee, police spokesman Anthony Guglielmi said. The gunman then pointed his weapon at another employee and forced her to the back of the store. 
 
 The armed customer then fatally shot the man, identified Sunday by the Cook County medical examiner's office as 55-year-old Reginald Gildersleeve. Other details about Gildersleeve weren't released. 
 
 No one else was hurt during the incident. It wasn't immediately clear whether the customer, who has not been identified, will face charges. Guglielmi said preliminary details suggest the customer was not at fault, but that the case was under review by local prosecutors. 
 
 "We're looking at it as a self-defense issue at this point," he said. 
 
 Last month, a Michigan woman with a concealed carry license shot at shoplifters fleeing a Detroit-area Home Depot store, flattening a tire of their SUV. No one was hurt, and the suspected shoplifters were arrested several days later. The woman faces up to 90 days in jail after pleading no contest to a charge of reckless discharge of a firearm. Two other shootings in which citizens fired at lawbreakers or potential lawbreakers also happened in September in Michigan. 
 
 "It's a slippery slope" when it comes to the question of whether citizens who are licensed to carry guns should intervene in dangerous situations, if at all, Guglielmi said. 
 
 "You have situations like this," he said, referring to the foiled Chicago robbery. "And you have situations that end tragically. The department is not going to advocate for what people should or shouldn't do." ||||| Police say charges are unlikely against a licensed concealed-carry gun owner who shot and killed a robbery suspect after he threatened a worker with what turned out to be a paint gun in Gage Park on the Southwest Side over the weekend. 
 
 "The Chicago Police Department is wrapping up its investigation and charges do not appear likely," the department said in a statement. 
 
 Police say Reginald Gildersleeve, 55, walked into the Agencia Mexicana at 2701 W. 51st St. around 7 p.m. Saturday. A customer was making a financial transaction with a worker at the store, which also serves as a currency exchange, when Gildersleeve, wearing a mask, announced a robbery and pulled out a gun, according to Anthony Guglielmi, a spokesman for Chicago police. 
 
 Gildersleeve and the customer "got into some kind of confrontation" and the customer pulled a gun and fired, hitting Gildersleeve several times, Guglielmi said. At least two workers were inside at the time, a 55-year-old woman and a 17-year-old girl, but no one else was hit. 
 
 Several law enforcement sources said Gildersleeve had been holding a toy gun, and one source said it was a paintball gun. 
 
 Gildersleeve had a lengthy arrest history, including at least one for robbery, and was out on bond from an unrelated incident from Oct. 23, according to police. He lived about three blocks from the store. 
 
 Police referred the case to the Cook County state's attorney's office to "determine if there's any reason to charge" the 44-year-old customer, who had a concealed carry permit and a firearm owner's identification card, Guglielmi said. Police also reviewed video surveillance. 
 
 Photo gallery: Concealed carry shooting in Gage Park (John J. Kim / Chicago Tribune) (John J. Kim / Chicago Tribune) 
 
 The department released a statement Sunday night saying charges were unlikely. 
 
 A man who identified himself as the shooter's brother declined to comment Sunday, saying the family was doing OK but had been through a traumatic time and wanted to keep things private. 
 
 The stepson of the suspect expressed anger and frustration, saying he doubted the police account. 
 
 "Something doesn't seem right," said Igbinosa Oronsaye, whose mother was married to Gildersleeve. "Reggie doesn't even own a gun. He couldn't own a gun if he wanted to." 
 
 Oronsaye said he wasn't convinced the shooter acted properly. 
 
 "Some people don't actually know how to use guns," he said. "They go to firing ranges, but it's not the same as a bullet going into someone's body, it's not the same as a bullet going into flesh. They should be able to wound first, kill next. He didn't deserve to get shot multiple times. 
 
 "You just took a brother, you just took a father from a lot of people. Somebody's got to answer for that." 
 
 No charges after robbery suspect shot, Nov. 2, 2015. (CBS Chicago) No charges after robbery suspect shot, Nov. 2, 2015. (CBS Chicago) SEE MORE VIDEOS 
 
 Oronsaye chuckled when recalling his stepfather's jokes and love of playing cards, and said his family is devastated at what happened. 
 
 "I'm the strong one in the family and I was crying this morning. So how do you think they feel?" Oronsaye said. "Now my heart feels like ice. I loved that man so dearly." 
 
 Tribune reporters Jeremy Gorner, Greg Pratt and Megan Crepeau contributed.
– Reginald Gildersleeve walked into a Chicago store Saturday night, wearing a mask, brandished a gun, pointed it at a worker and forced her to the back of the store, and announced his intention to rob the place, police say. That's when another customer, who has a concealed-carry license, confronted Gildersleeve, took out his own gun, and fired several times, killing the 55-year-old robbery suspect, authorities say. It turns out Gildersleeve was only brandishing a fake gun at the time, but police say the investigation is almost finished and charges against the man who shot him are not likely, the Chicago Tribune reports. Gildersleeve's gun has been variously reported to have been a paint gun, a toy gun, and a paintball gun. Gildersleeve's stepson isn't happy, noting that his stepdad "doesn't even own a gun. He couldn't own a gun if he wanted to" and questioning the actions of the man who shot him. "Some people don't actually know how to use guns. They go to firing ranges, but it's not the same as a bullet going into someone's body, it's not the same as a bullet going into flesh. They should be able to wound first, kill next. He didn't deserve to get shot multiple times," the stepson says. "You just took a brother, you just took a father from a lot of people. Somebody's got to answer for that." But "we're looking at it as a self-defense issue at this point," a police spokesperson tells the AP. "You have situations like this," in which no one else was hurt, "and you have situations that end tragically. The department is not going to advocate for what people should or shouldn't do."