There was once a young boy and his sister. One day their parents went out to run some late errands they had put off until the last minute. Before they left they told their children not to open the door under any circumstances.
Because they were watching TV, they didn't pay much attention. About an hour after they left, there heard a knock, knock, knock, knock. Knock, knock, knock. The children who were now in their rooms asleep, were awoken at once.
Knock, knock, knock. Knock, knock, knock. Finally the sister got up wondering who it could be. her brother lay awake in his bed listening. When he heard nothing for a few minutes and his sister did not return, he got a little scared.
He decided to go to his neighbors house, who were very close friends of his. He got out of bed and headed for the front door in the dark. When he got to his neighbors house, he found them awake.
They told him they were relieved he was there, because they had just heard on the news that a murderer had been spotted just a few blocks away not too long ago. In the morning, they discovered the sisters body and a discarded knife on the brothers bed. Submitted by Scary Story Guy