Ok now I do believe in ghost...it's kinda hard not to believe in something not only you have seen but your mom and little brother have seen and do see regularly. I've had my fair share of encounters with them.
I just wanted to add that it doesn't make since to not believe in ghost or an after life. I will honestly never understand how anyone could not believe in them. Even if I had never seen one and didn't know anyone who had I'd still believe they were there. It doesn't make since otherwise