[1] Lelek took part in the widespread and systematic attacks on Bosniak civilians that were carried out in Višegrad between April and June 1992 by Bosnian Serb forces assisted by paramilitary groups from neighbouring Serbia.
[1] Lelek was found guilty of taking part in persecution of the Bosniak (Bosnian Muslim) population, grave freedom deprivations, grave sexual assaults and forcible transfer of the population, in a campaign during which Bosnian Muslim men were abducted from their homes and places of work, detained and killed while women were taken to a camp where they were tortured and raped.
In May and June 1992 Lelek and other Bosnian Serb soldiers and policemen abducted Muslim men from their homes near Višegrad and imprisoned them.
Azra Osmanagić, a prosecution witness, one of a group of Višegrad women forcibly transferred to Bosnian government-held territory and whose husband was abducted and killed, observed that Lelek "was raised with us, went to school with us, lived by us and did such terrible things".
On 12 January 2009, the Appellate Panel modified the First-instance Verdict and found Lelek guilty of crimes against humanity and sentenced him to 16 years of imprisonment.