The main suspect in the case of a plot to assassinate Russian President Vladimir Putin, Adam Osmayev, has retracted testimony he gave during the preliminary investigation of the criminal case against him.

Osmayev's partner Anina Okuyeva handed out a relevant statement by the defendant to journalists before a sitting of Prymorsky District Court in Odesa on Thursday.

Okuyeva also gave reporters another statement by Osmayev addressed to Odesa Regional Prosecutor Oleksandr Halkin, saying that law enforcers used torture against the defendant during the investigation.

"This evidence was received as a result of physical and psychological pressure exerted on me by law enforcement officials since my detention… When this case was considered, I recanted all evidence given by me earlier in writing and demanded an investigation into the torture [...]. Bearing these facts in mind, I have to refuse to give explanations in a court hearing in accordance with Article 63 of the Constitution. I am asking for this statement to be filed with the case materials," Osmayev said.

In the statement given by Okuyeva to the press, Osmayev alleges that Ukrainian Security service officials beat him on the head with pistol handles, kicked him, put a plastic bag over his head, and gave him drug injections during his detention on February 4, 2012.

Osmayev also said the beating likely led to cracked ribs, which gave him serious pain for many months.

The suspect also says law enforcement officials threatened to beat him if he did not admit his involvement in the preparations for the killing of Chechen leader Ramzan Kadyrov and Vladimir Putin.

The judicial collegium of the Odesa Prymorsky District Court continued trying Osmayev's case on Thursday.

A group of individuals were arrested on February 4, 2012 on suspicion of perpetrating a bombing in Odesa on January 4, 2012.

Ilya Pyanzin, a Kazakh national who was injured in the explosion and detained, told investigators that Osmayev was the leader of the group suspected of the bombing, and Osmayev was arrested soon thereafter.

In February 2012, the SBU confirmed that Osmayev and Pyanzin had plotted to murder Putin after the March Russian presidential election, and that Ukrainian and Russian intelligence services had thwarted the alleged plan.

In summer 2012, Russia asked Ukraine to hand over Osmayev and Ilya Pyanzin, but the men's defense lawyers contested the prosecutor's decision on their extradition. Despite the fact that the courts upheld the extradition to Russia, the delay enabled Osmayev's lawyers to file a claim contesting his extradition with the European Court of Human Rights. The lawyers for Pyanzin prepared to file a similar claim, but did not have the time to file it because Pyanzin was extradited to Russia in late August 2012. In Russia, he recanted the evidence he had given in Ukraine.