he was banned thanks zonia

one day I came home tony house in minetown to find lots of stuff stuff stolen: diamonds iron LOTS of wood and cobble. So I was trying to find the person when he appeared in my house looking through my chests. So I wrote down his name and got a bucket of lava and burned him to death yet he still came back so I did it again. He just kept coming and coming and took lots of my stuff. Would there be way to ban him?