Prosecutors in the retrial of Kosovo's former prime minister Ramush Haradinaj sought "at least" 20 years in prison on war crimes charges Monday.

"The least sentence that should be imposed is one of 20 years imprisonment," prosecutor Paul Rogers told the Yugoslav war crimes tribunal, which had ordered the retrial after judges found witnesses were intimidated during Haradinaj's original 10-month trial.

Haradinaj is the former leader of the ethnic Albanian Kosovo Liberation Army (KLA), which fought for Kosovo’s independence from Serbia in 1998. He is accused of crimes--incuding killing and torture--against Roma, Albanian and Serb civilians at the KLA’s detention center in Jablanica in western Kosovo. 

At the end of his original trial in 2008, the court acquitted Haradinaj of 37 war crimes charges and sentenced his co-accused Lahi Brahimaj to six years in prison.

In 2010, the Appeals Chamber ordered Haradinaj's partial retrial because trial judges “had erred in failing to secure” the testimony of two key witnesses, “thereby depriving the prosecution of vital support for its case.”

His retrial began in August 2011.

Prosecutors are expected to wrap up their closing arguments Tuesday.