What Happens When You Take a Lieutenant's Tags in MW4 DMZ?
Lieutenant kills can pay without taking the tags. Boss Board progression requires an extraction that broadcasts your position to rivals.
Taking a lieutenant's dog-tag case in MW4 DMZ exposes your position to other players. Killing the boss can earn rewards; getting the case out is what advances the Boss Board. Plan for both fights: the lieutenant encounter and the trip to extraction.
Call of Duty's October 6 Dynamic Ops video focuses on that hunt. It shows objectives involving key targets, supplies, and lieutenants, with specialist defenders protecting high-value enemies. The important part for a squad is what happens after the target goes down.
The tags turn the escape into a contested objective
The official Hajin breakdown says a lieutenant's tag appears on the Tac Map. Pick it up and your location is broadcast, giving rival players a chance to pursue the carrier. Extracting the case moves the Boss Board forward.

That changes what a successful fight means. A squad can win the encounter and still lose the progression item before reaching extraction. Clearing nearby enemies is only useful if you have enough resources left to handle the journey back.
Game Pelt's practical read: work out an exit before committing to the hunt, then reassess after the fight. If the squad is depleted, carrying the case creates a risk you do not have to accept automatically.
Leaving the case is a legitimate decision
Call of Duty confirms that killing a lieutenant can award substantial DMZ XP and cash without recovering the Dog Tag Case. There is also a chance of a key dropping for that lieutenant's special loot room. Taking the case serves a different purpose: Boss Board progression.
That distinction matters. You are choosing whether to add an exposed extraction objective to the rewards already earned. A squad that only wanted the kill's immediate payout can walk away; one trying to progress the Boss Board needs to get the case out.
Hunt towers can reveal an active lieutenant's general location. The targets have increased durability and distinct combat behavior, so locating one does not mean the encounter will be easy.

Squad credit and solo difficulty still need answers
TheXclusiveAce's October 6 breakdown asks two useful questions: does extracting one case credit the squad, and how manageable will lieutenant hunts be for solo players? The official sources checked do not settle either point.
Those details could change how much repetition or coordination the system asks from players. Until they are confirmed, do not assume shared credit, scaled solo encounters, or a guaranteed PvE-only deployment option.
The confirmed mechanic is enough to plan around: the case advances progression, but carrying it makes your escape easier for rivals to track. Choose the hunt for that specific reward, and leave enough resources to finish it. The boss kill alone does not complete the job.