Glenn Rhee is a Scout hero, with the following Leader trait:

Lucky Dumpster

After interacting with an object, Glenn is able to move and attack. Glenn gains Supplies after each mission equal to X% of the Experience earned from Glenn's kills.
Lucky Dumpster can trigger once per turn.

As a leader, all of your team members gain these bonuses.

Notes:
• Lucky Dumpster stacks with other traits that grant extra action points, so activating Swift Strike/Tactical/Cold-Blooded no longer disables the extra move and attack from Glenn's leader trait
• Opening a crate after activating Tactical/Cold-Blooded will still allow Glenn to attack one more time