Hunting Someone Down Options

[Iduno]

I'm planning on having the players try to hunt down someone who is in hiding. What type of rolls would that be?

Maybe tracking if they've been somewhere recently, and shadowing to tail them? Some sort of matrix or social test to get close to where they are? Make up a set of clues and hope the players find the clues and get the correct information from it? Probably a bit of all of them?

I notice the blandness quality mentions social tests to find someone, but doesn't mention what sorts of rolls would be called for.

For the full story: the target is a former musician being hunted by bounty hunters for unpaid debts, and the players have to find the target and bring him safely to the band so they can re-start their careers. Knowing he is being followed, he moves around, but will still go hang out places he knows are willing to be discreet. Once the players start looking, the bounty hunters (if they hear the players are looking) might follow the players to find out what they know. We can roleplay some of that, but I'm stuck on what to do when the dice come out. I am also willing to take suggestions on clues they can find.