The investigating judge held the hearing in Zagreb due to the poor health condition of one of the three witnesses who could not travel to Osijek to be questioned.
A spokesman for the Osijek County Court, Miroslav Rozac, said Croatian Army General Karl Gorinsek was prevented by his illness to travel to Osijek.
In late 1991, when ten civilians were killed by the Drava River in Osijek in the case later dubbed the Sellotape Case, Gorinsek was the commander of the Osijek Operations Zone.
Glavas, who is suspected of having been involved together with another six suspects in the killings of the civilians and the attempted killing of Radomir Ratkovic, became the commander of Osijek's defence at the end of 1991.
The investigative proceedings in the Sellotape case will resume before the Osijek County Court on Friday.
Judge Kovac scheduled another three hearings for next week.
The defence team of Glavas, an independent member of parliament, proposed the questioning of 20 witnesses.
The Zagreb County Court on Thursday completed the investigation against Glavas in the so-called Garage war crimes case by hearing the last prosecution witness and was to send the case file to the County Prosecutor's Office on Friday to decide whether to issue an indictment or not.