how i can stop the animator to play trigger animation?

hey guys , i have an enemy script that detect the distance to the player and do actions....so when the enemy health is <= 0 i want him to die ..if(health<=0){ animator.SetTrigger("die")}, the problem i have is the enemy is keep playing die animation, i know the problem is the enemy is keep checking the distance to the player but i dont know how to solve this here is the script: using UnityEngine; using System.Collections;

public class enenyscript : MonoBehaviour { public Transform player; Animator anim; public float inrange; public CharacterController cc; public float speed; public int health; public float destroytime;

 // Use this for initialization
 void Start () {
     anim = GetComponent<Animator>();
   
     
 }
 
 // Update is called once per frame
 void Update ()
 {
     if(inRange())
     {
         transform.LookAt(player.position);
         anim.SetBool("attack",true);
         
        
         
     }
     else if(!inRange())
     {
         Chase();
         anim.SetBool("attack",false);
         
     }
     
 
 }

 bool inRange()
 {
     if (Vector3.Distance(transform.position, player.position) <=inrange)
     {
         return true;
     }
     else
     {
         return false;
     }

 }

 void Chase()
 {
     transform.LookAt(player.position);
     cc.SimpleMove(transform.forward * speed);
     anim.SetFloat("Speed",1);
    

 }

  
 public void gethit(int damage)
 {
     health = health - damage;
     if(health<0)
     {
         health = 0;
         anim.SetTrigger("die");

         
        




     }
 }


 

 void OnMouseOver()
 {
     playercombat.opponent = transform;
 }

 

}