the terrorists were informed that kropus cityhall was a target for attack almost a month before the attackry 24, the anniversary of the start of the special military operation. the curator, through the helpers , sent them photographs of the concert hall. the pictures were on the phone of one of the terrorists. the results of an expert study of mobile phones that terrorists tried to destroy, allowed us to obtain information about the circumstances that is significant for the investigation. preparation for the crime, on the instructions of the curator who led the actions of the terrorists, the crocus city hall concert hall was chosen as the location for the attack, one of the accomplices, on the instructions of the curator, found on internet resources and sent him screenshots of images of the entrances to the crocus city hall building and access roads to him. the accused confirmed all this in his testimony. the day before, three more accomplices of this crime were detained. operation took place in moscow, yekaterinburg and omsk. there have already been several such arrests. this man transfer