My Monster doesn't go for others if not in range

Greetings, In my code, as you see Monster tries to find 0 index. If so, goes there and kill. then it will also go for others because we remove from the list. My problem is here, If we move away (thats the purpose) 0 indexed innocent, it wont look for other innocent in range. I tried to increase Index but in time, i get an index error.

 private void Start()
     {
         _gameManager = GameObject.Find("GameManager").GetComponent<GameManager>();
 
         StartCoroutine(MoveCoroutine());
     }
 
 
 
 
     IEnumerator MoveCoroutine()
     {
         yield return new WaitForSeconds(3);
 
         while (true)
         {
             MoveToInnocents();
             yield return null;
         }
 
     }
 
 
     private void MoveToInnocents()
     {
         
         
         Debug.Log(_innocentIndex);
 
         if (_gameManager.İnnocentList.Count > 0)
         {
             var targetPosition = _gameManager.İnnocentList[_innocentIndex].transform.position;
             
             
             if (Vector3.Distance(transform.position, targetPosition) < range)
             {
                 transform.position = Vector3.MoveTowards(transform.position, targetPosition, speed * Time.deltaTime);
                
                 if (Vector3.Distance(transform.position, targetPosition) < 0.3f)
                 {
                     _gameManager.DestroyInnocent(_innocentIndex);
                 }
             }
             
             
             
             
             else if(Vector3.Distance(transform.position, targetPosition) > range)
             {
                 Debug.Log("Out of Range");
             }
             
 
             
         }
         
 
     }