EnemyZombie.cs

using UnityEngine;
using System.Collections;

public class EnemyZombie : MonoBehaviour {
    public Ray ray;
    public GameObject player;
	// Use this for initialization
	void Start ()
    {
	
	}
	
	// Update is called once per frame
	void Update ()
    {
        RaycastHit hit;
     //   ray = new Ray(player.transform.position, transform.position);
        ray = new Ray(gameObject.transform.position, new Vector3(gameObject.transform.position.x, gameObject.transform.position.y, gameObject.transform.position.z - 4));
        if (Physics.Raycast(ray, out hit))
        {
            if (hit.collider.tag == "Player")
            {
                Debug.Log("Hit, hit, damage report");
              //  transform.position = player.transform.position;
            }
            else
                Debug.Log("No Joy");
        }
	
	}
}