Killing the guy tracking you breaks tracking trail until he tracks you again.
Also the halloween masks will do this also.
I was being tracked by a few people heh, then got traped in a tight spot with e-fields. took a while but they got me.
I only have room for 50 ninja for smoke bombs and I was in wrath form so couldn't try to go dog because I would of had to come out of wrath. not even sure if going to dog form would work.
I tryed the halloween mask but they pop you out of hiding.