All enemies die when one does

I'm having a problem with the scripting in my game. When I jump on one enemy to kill it all the enemies die. They were all dragged into the scene view from a prefab. Here is the script on my enemies:

 public float velocity = -3;
     public Transform startCast;
     public Transform endCast;
     public bool GroundHit;
     public bool OnGround;
     public bool WallHit;
     public Transform WallCheckStart;
     public Transform WallCheckEnd;
     public Transform GroundCheckStart;
     public Transform GroundCheckEnd;
     public LayerMask GroundLayer;
     public LayerMask WallLayer;
     public static bool dead, noMoreKillPlayer;
     private GameObject me;
     public BoxCollider2D Box1, Box2;
     Rigidbody2D rg;
     SpriteRenderer spritey;
 
     IEnumerator KillSequence(){
         if (PlayerControls.DoneKilling) {
             rg.gravityScale = 0;
             spritey.sortingLayerName = "EnemyBG";
             Box1.enabled = false;
             Box2.enabled = false;
             yield return new WaitForSeconds (2f);
             Destroy (me);
         }
     }
 
     void Start () {
         me = this.gameObject;
         dead = false;
         rg = GetComponent<Rigidbody2D> ();
         spritey = GetComponent<SpriteRenderer> ();
     }
 
     void FixedUpdate () {
         rigidbody2D.velocity = new Vector2 (velocity, rigidbody2D.velocity.y);
         GroundHit = Physics2D.Linecast (startCast.position, endCast.position, GroundLayer);
         OnGround = Physics2D.Linecast (GroundCheckStart.position, GroundCheckEnd.position, GroundLayer);
         WallHit = Physics2D.Linecast (WallCheckStart.position, WallCheckEnd.position, WallLayer);
         if (!GroundHit && OnGround || WallHit) {
             transform.localScale = new Vector2(transform.localScale.x * -1, transform.localScale.y);
             velocity *= -1;
         }
         if (dead) {
             this.velocity = 0;
             StartCoroutine(this.KillSequence());
         }
     }

This script is on the killbox which is a child of the enemy:

 public GameObject me;
 
     void OnTriggerEnter2D(Collider2D hit){
         if (hit.tag == "Feet") {
             SimpleEnemy.dead = true;
             SimpleEnemy.noMoreKillPlayer = true;
         }
     }
     void FixedUpdate(){
         if (SimpleEnemy.dead == true && PlayerControls.DoneKilling == true) {
             me.SetActive(false);    
         }
     }

I think the problem is that the dead variable is being set true for everyone with the enemy script on which is all of the enemies. Would I have to distinguish which enemy I am jumping on in either the player or enemy script? If so, how would I do that?