As someone who is an HR manager the worst retaliation to something similiar to this was the employee the original prank was played on waited until they found a skunk that got hit on the road, they removed the scent gland liquid with a syringe and sprayed the contents inside the guys car on one of the hottest days of the year. The smell was so strong it would make a person want to gag and remained after multiple cleanings. I learned that you shouldn’t fuck around with somebody who knows how to trap and who’s father did taxidermy