Earlier in the day, the FSB reported that Nemtsov, who was shot dead in central Moscow in February 2015, was killed with a homemade firearm assembled using imported parts.
"Anyway, the origin of the handgun will not have any impact on the common version of the investigation. I am sure that the majority of the detained are implicated in the crime, and Zaur Dadayev is a shooter, who had a service gun, but he shot not with it," Vadim Prokhorov told RIA Novosti.
On February 27, 2015, Nemtsov, who occupied a number of senior positions in the Russian government in the 1990s, and was an active opposition figure in the 2000s, was shot dead in downtown Moscow.
Five persons were detained on suspicion of involvement in the murder — Dadayev, Hamzat Bakhayev, Tamerlan Eskerkhanov, Shadid and Anzor Gubashev. The alleged mastermind of the murder, Ruslan Mukhudinov, has been arrested in absentia.
