AI Guard Finding Player Footprints as Stimulus

I’ve been working alongside the Creating AI with Behaviour States in Unreal Engine By Patrick Haslow and I have been developing it further to try and collect stimulus from the player footprints and use that to hunt down the player character. Best example I can provide is what the guard does in metal gear solid when it see’s footprints and must investigate.

The player spawns footprints via a decal on the floor, The AI currently is using 3 senses via AIPerception where it already checks to see if the objects is the player character.

My query is should I try to make another separate query for footprints or piggy back of the already existing coding to do the checks? Any one got any suggestions?