The politicians, be it President, Prime or other Ministers, or just members of the parlament - usually don't directly put criminals behind bars.

That said back in 2003, so ~2 years after the previous student protests in Serbia that brought down Milošević - Serbian Prime Minister was assassinated.

Officially the assassination was done by criminal gang that had ties with previous government - that just so happened to also be (former) members of the special antiterorist (military) police.

And it is said that he was assassinated because he was doing things (setup special investigation/prosecution) to fight organized crime.

While some of the current students might not know about all that. Older people, the ones that are now discussed/proposed as ministers and such - definitely know about.