Cannot reset animator trigger

I am having problems resetting an animator trigger. Here is my script:

Code (CSharp):

1.     void Update ()
2.     {
3.         stunObject.SetActive (unit.IsStunned () && unit.HP > 0);
4.         if (stunObject.activeSelf) {
5.             GetComponent<Animator> ().SetTrigger ("Freeze");
6.             Debug.Log ("freeze");
7.         }
8.         if (unit.HP <=0) {
9.             GetComponent<Animator> ().ResetTrigger ("Freeze");
10.             GetComponent<Animator> ().SetTrigger ("Destroy");
11.             Debug.Log ("unfreeze and destroy");
12.         }
13.     }

When the unit is stunned the stun object becomes active and the "Freeze" animation plays. This works fine. If unit's health (HP) equals or is less than 0, I want to reset the freeze animation and play the destroy animation. The actual debug log works but the animation becomes stuck in the Freeze state. Any suggestions??

Thanks