In the evening, to Matveev and Stepanov, drinking alc

In the evening, drunk Fedorov came to Matveyev and Stepanov, drinking alcohol in the house of the latter’s mother. A quarrel arose between Matveyev and Federov. Matveyev, after a quarrel in the house, went alone to see Fedorov home, and in the absence of Stepanov, a fight broke out in their yard, as a result of which he caused the victim an open fracture of the bones of the lower jaw and a wound to the right superciliary arch. Stepanov, who had run out of the house at that time, hit Fedorov in the head with a wooden mallet and caused the victim numerous open fractures of the skull bones with hemorrhage in the substance of the brain. The victim, taken to the hospital, died that evening.
The verdict of the court, Stepanov and Matveyev were convicted under paragraph 2 of Art. 105 of the Criminal Code, as having committed murder by a group of persons by prior conspiracy. Is the court verdict correct? Justify your answer.