A Russian jury found five men guilty on Thursday in the 2015 murder of Russian opposition leader Boris Nemtsov, The Associated Press reports. But questions remain about who ordered the killing.Nemtsov, a prominent critic of President Vladimir Putin, was shot dead late on the night of Feb. 27, while walking across a Moscow bridge, as The Two-way reported. At the time of his death, he had been working on a report about Russia's role in the Ukrainian conflict.The jury found former Chechen security officer Zaur Dadayev guilty of fatally shooting Nemtsov from a passing car. Dadayev worked in the security forces of Chechnya's leader, Ramzan Kadyrov,The other four men — also Chechens — were convicted as accomplices. Prosecutors said they helped obtain the murder weapon and get Dadayev to the scene, according to AP.The men were promised a bounty of 15 million rubles — or more than $200,000 — to kill Nemtsov, Reuters reports.But investigators said it's still not clear who ordered the murder. Some Nemtsov supporters say that's because the investigators did not try to find the answer.As AP reports:"Nemtsov's allies squarely blame the murder on Kadyrov, who has been accused of numerous human rights violations including torture and killings, saying that the officers could not possibly have acted without his explicit orders. Kadyrov denied any role in the assassination.""Kadyrov has called Russian opposition leaders 'enemies of the people' and 'traitors,'" reports NPR's Lucian Kim.On Thursday, Zhanna Nemtsova, Nemstov's daughter, said no high-profile Chechen officials have ever been questioned. She said in a Facebook post that despite the verdicts, the case remains unsolved."Investigators and the court clearly did not want to uncover the truth about this crime," Nemstova said in Russian, AP reports. "There was only one task: find the triggerman and hold a trial. They did just that. But we will continue to fight for the truth by any means we have."The news service says prosecutors are expected to announce the sentences they are seeking from the judge at a hearing next week.At the time of his death, 55-year-old Nemstov headed the opposition People's Freedom Party. He had served as first deputy prime minister under Boris Yeltsin in the 1990s and was in the running for the presidency before withdrawing in 2007. Putin won the race.Nemtsov is one of a number of Kremlin critics who have died in recent years under questionable circumstances."Political murders in Russia will continue if the masterminds of this attack are able to get away with this," Nemtsov ally Ilya Yashin told AP. Copyright 2017 NPR. To see more, visit http://www.npr.org/.