Banja Luka police filed reports to a competent Prosecutor's Office against four persons under suspicion of posing a security threat and inciting it, the police confirmed on Tuesday. Unofficially Davor Dragicevic is one of them.

Dragicevic's whereabouts were unknown since Monday when police issued warrants for him and few other persons who participated in the Sunday protest at Banja Luka's central square.

“Person with initials D.D. is suspected of committing a criminal act of posing a security threat, because he addressed serious threats on December 17 and 30, 2018 at two different locations in Banja Luka area against two persons, which triggered the feelings of fear and insecurity,” said the police report.

For nearly a year, Dragicevic and the Justice for David group have been demanding that authorities unveil who murdered his son, 21-year-old David Dragicevic whose lifeless body was found in March this year in a river of the north-western Bosnian town of Banja Luka.

The gatherings that father was organising in a central square the group unofficially named after the young man have turned into a mass anti-government protest as Dragicevic claimed the police and political leadership of Bosnia's Republika Srpska entity were involved in covering the evidence in this case.

Banja Luka police apprehended and then released several members of the Justice for David movement as well as some opposition politicians, banning all future gatherings of the group.