The case resumes Tuesday after Hitschmann failed to turn up at the High Court on November 27 last year.
Prosecutor, Chris Mutangadura said Hitschmann who is the state's key witness is set to testify.
"I am sure that he is going to testify on Tuesday," Mutangadura said. "He is scheduled to testify and there is nothing which will stop him. The case might be prolonged because as we are now approaching to cover the real issues and this may result in the case taking longer than expected."
The state accuses Bennett – treasurer in Tsvangirai’s MDC-T party – of plotting to overthrow Mugabe and that he deposited money into the Mozambican bank account of Hitschmann to buy weapons to be used to assassinate the veteran leader.
The state seeks to prove to court that guns and other weapons found at the home of Hitschmann, a registered firearms dealer, were intended for use to assassinate Mugabe and that they were bought with money supplied by Bennett.
But Hitschmann was found not guilty of treason in an earlier ruling by the High Court which also found that some of the weapons seized from the firearms-dealer were lawfully in his possession.
Hitschmann has also claimed that investigators tortured him in a bid to obtain from him statements that could incriminate Bennett.
