Robert Kovacic, a former member of the Croatian Defence Council wanted for war crimes, was arrested last month in the United States on a warrant issued by Bosnia and Herzegovina, and is now awaiting an extradition hearing in a US court in July.
Kovacic, now 66, was arrested in Roanoke, Virginia on May 16. He is currently in custody in the US and his extradition is pending.
The Constitutional Court on Tuesday rejected Nihad Bojadzic's appeal against verdicts under which he was sentenced to a total of 15 years in prison for crimes committed in 1993 during the war in Jablanica and in the village of Trusina, near Konjic.
The Constitutional Court described Bojadzic's appeal as "unfounded".