Puhovski said the showing was not timed to coincide with the retrial of eight former military police accused of crimes against civilians committed at Lora.
The film, which premiered at the Zagreb Film Festival on October 15, was produced by Factum Film from Zagreb and Television B92 from Belgrade.
The film features testimonies by some 15 former prison inmates from Serbia and Montenegro and Bosnia-Herzegovina about torture and murders in the prison, as well as interviews with Croatian generals and military police officials from Split County, legal experts, journalists and a former Austrian parliamentary deputy.
The film describes the situation in Croatia and Split in 1991, the POW exchange in Nemetin in 1992, and the first trial for war crimes committed at Lora in 2002.
Puhovski said after the Belgrade showing the film was patriotic and not anti-Croatian because it strived to liberate Croatia from a crime all were accused of.
"The issue is to individualise guilt for the crimes. A good portion of veterans and volunteer associations don't see that they are hostages to a group of people who have skeletons in their closets and are using them to protect themselves, whereas a great majority (of veterans and volunteers) defended their country honorably," said Puhovski.
Attending the showing was a large audience, including several former inmates who spoke about the film.
The documentary will soon be shown on Television B92, it was announced.
The Croatian Supreme Court quashed the initial verdict in the Lora trial, which acquitted all eight defendants, in late August, requesting a retrial before a new panel of judges. The date of the retrial has not been set yet. Three defendants have been placed back into custody, while arrest warrants have been issued for the remaining five.