There was an attack on your Lord's life by an unknown assassin. Through your investigation you discover not only the culprit - a kolat no less - but also a maho-tsukai. Before you can report your findings both flee from the palace.
They run in different directions. You don't have time to find reinforcements, nor report to your lord. Both are armed and very dangerous. If you do not take chase to either they will get away.
You must choose one to pursue and deal with. Which takes priority? Is it down to personal preference? Does the empire hold one to be worse? Is it your Lord's discretion (from whatever history he has)? The one that acted on his life is most important? The Kolat could lead to more cells. The maho could corrupt he land and people.
Assuming of course you know about the Kolat being more than assassins.