The 43-year-old was one of soccer player Niko Kranjcar's agents.
Police said they would interview some athletes and public figures the victim was in touch with.
After his Mercedes was set on fire 18 months ago, the media began linking Pokrovac with organised crime.
The police have still not found out who bombed the car and said today the two events might be linked.
The police said that Pokrovac did not ask for protection after his car was destroyed.