Losing power up bool value

I'm just about finished on a 2D shooter game and everything is working perfectly except for my score multiplier power up. I know the bool value is being set to true when the player picks it up but when I kill an enemy the value is false...not sure what's going on here's my code for the power up

private GameObject objPlayer;
	private AIscript scriptAI;
	// Use this for initialization
	void Start () {
		objPlayer = (GameObject) GameObject.FindWithTag("Player");
		scriptAI = (AIscript) objPlayer.GetComponent(typeof(AIscript));
	}
	void removeMe ()
	{
		Destroy(gameObject);
	}
	void OnTriggerEnter (Collider Other)
	{
		if (Other.gameObject.tag == "Player") //only player can trigger powerups
		{
			scriptAI.isMult = true;
			Debug.Log("multi picked up!!");
			removeMe();
		}
	}

and where the value is used in the character script

//boolean vars for power ups
	public bool isLaser;
	public bool isSpread;
	public bool isMult;
    private float powUpTime; //local timer variable for laser and spread power ups
	private float powUpTime2; //local timer variable for score multiplier power up
	private float powUpLength = 10f;

void Start () {
		powUpTime = powUpLength;
		powUpTime2 = powUpLength;
		isLaser = false;
		isSpread = false;
		isMult = false;
	}
void Update () {
		//check for newly acquired power up and start timer
		if (isLaser || isSpread)
		{
			powUpTime -= Time.deltaTime;
			if (powUpTime <= 0)
			{
				isLaser = false;
				isSpread = false;
				powUpTime = powUpLength;
			}
		}
		if (isMult)
		{
			powUpTime2 -= Time.deltaTime;
			if (powUpTime2 <= 0)
			{
				isMult = false;
				powUpTime2 = powUpLength;
			}
		}
}

void removeMe () //removes character
	{
		if (thisIsPlayer == false)
		{
			Instantiate(ptrScriptVariable.parAlienDeath, transform.position, Quaternion.identity);
			GUIvarScript ptrScriptGUIvar = (GUIvarScript) objPlayerStats.GetComponent(typeof(GUIvarScript));
			ptrScriptGUIvar.enemiesKilled += 1;
			//check for multiplier power up
			if(isMult)
			{
				Debug.Log("multi!!");
				ptrScriptGUIvar.score += 20;
			} else {
				Debug.Log("no multi!!!");
				ptrScriptGUIvar.score += 10;
			}
		} else {
			Instantiate(ptrScriptVariable.parHumanDeath, transform.position, Quaternion.identity);
		}
		Destroy(gameObject);
	}

i'm not sure how I could be losing the value because the logic seems right to me but I am fairly new to unity and C# so who knows