can you kill bacteria by freezing? or just boiling?

Philippines
@bulastika (5968)
December 8, 2009 6:03am CST
Hi guys! I have a problem, cause be boiled our drinking water to kill bacteria and some if not all harmful germs.. But my brother love to put ice cubes on his drinks. But my concern is what the point of boiling the water if the ice that he used is not boiled.. He said that the ice is frozen so the bacteria is dead.. I use the boiling point He use the freezing point to kill bacteria and germs.. Is that true? you can kill bacteria by freezing? or boiling is the only method that can kill bacteria and germs?