A pensioner from Sveroralsk sold an unnecessary knife and became a defendant in a criminal case related to the sale of weapons. The man posted an ad on the Internet, a buyer was quickly found, but the deal turned out to be an operational experiment. "The police came and said: 'Investigative actions are being taken against you.' To say that I was surprised is to say nothing," recalls Oleg Grabniuk, who became the main character of the crime story. Investigators considered the blade offered for sale to be a bladed weapon. The pensioner did not believe what was happening until the last moment, because he himself once bought a knife in an online store, and the required certificate was attached. However, after examination, the document was recognized as a document, the knife was recognized as a weapon, and the seller was recognized as an illegal dealer. So where is the line between a legal knife and an illegal knife? And how not to be among the suspects? The answers are in our video.