A daughter of Russian opposition leader Boris Nemtsov says Vladimir Putin must bear responsibility for his murder, reports GHN based on BBC.
Zhanna Nemtsova told the BBC she believed the Russian president was "politically" to blame.
Mr Nemtsov, a former deputy prime minister and veteran liberal politician, was shot dead on 27 February while walking with his girlfriend near the Kremlin.
President Putin has condemned the murder and vowed to find the killers.
Meanwhile, one of the men charged over the murder has said he was forced into a confession.
Zaur Dadayev told prison visitors that he was tied up for two days with a bag on his head, and only confessed to the killing so that a friend would be freed.
Speaking to the BBC's Gabriel Gatehouse, Ms Nemtsova echoed previous claims made by her father's allies that his killing was politically motivated.
"He was the most prominent critic of Putin. He was the most powerful leader of the opposition of Russia," she said.
"After his death the opposition is beheaded and everybody is frightened," she added.
"Now we do not have any other figure so powerful... with so much expertise and experience to confront the officials."
The 30-year-old, who is a stock market analyst and TV presenter at a financial channel in Moscow, said she had not been contacted by Russian investigators because they were "not interested in an independent investigation".
Officials have yet to cite a motive for Mr Nemtsov's murder.