A Chicago thrift store worker died after a handgun hidden in a donated item of clothing went off and the bullet hit the woman in the chest, police said.

Carmen Dominguez, 54, was sorting through clothing with a fellow colleague at a Unique Thrift Store in Chicago, when she was fatally shot in the chest at 9:42 a.m. on Friday, a Chicago Police Department spokesman said.

The unidentified male coworker found a sock with something heavy inside, and emptied the contents into his hand, police said. The object turned out to be a .22 caliber handgun that went off and hit Dominguez in the chest.

Who is to blame for this? The same people who insist that gun ownership must come with no responsibilities, no safety training, no checks, no sense of heaviness, no nothing. This astonishing laxity has resulted in a culture of carelessness and stupidity around guns. Judging from a number of reports ("Police said there was a .22 caliber handgun inside [donated sock], which accidentally discharged while in [witness's] hand), and I will keep track of this story as it develops over the next few days, my guess is that the death of this poor woman was made possible by a kind of gun culture that's specific to the United States.