KIEV, July 15 (RAPSI) - The investigation of former Prime Minister Yulia Tymoshenko's possible involvement in the murder of MP and businessman Yevhen Shcherban is 90% complete, a prosecutor said.

"The investigators are waiting for the concluding testimony," deputy head of the Prosecutor General's Office's department for high-profile cases Oleh Pushkar said in an interview with "Komsomolskaya Pravda v Ukraine" newspaper published on Monday.

"We have completed 90% of the work. We are only waiting for the implementation of instructions and requests for legal assistance. We are also waiting for the testimony that will close the investigation. After the lawyers and complainants read the case materials, we will be ready to send the case to the court," Pushkar said about the Shcherban murder case.

Yevhen Shcherban, chief of the Aton financial corporation and a member of parliament, was shot dead at Donetsk International Airport in November 1996. His wife and an airport employee were also killed.

The Prosecutor General's Office claims that the murder was ordered by former prime ministers Tymoshenko and Lazarenko. According to the investigators, Shcherban stood in the way of making United Energy Systems of Ukraine, which Tymoshenko headed at the time, the Donetsk Region's monopoly gas distributor.

The investigators claim that Tymoshenko and Lazarenko paid $2.8 million for Shcherban's murder. If Tymoshenko is found guilty as charged, she could be sentenced to life in prison.

The prosecutors earlier said they have sufficient evidence for charging her with complicity in the murder.

Tymoshenko is currently serving a seven-year sentence in a penal colony in Kharkov for abuse of power when she signed a gas deal with Russia in 2009. Since May 2012, she has been undergoing treatment in a hospital in Kharkov.

She has also been charged with committing financial fraud when she was head of United Energy Systems of Ukraine in the 1990s.