Ugh, I loooooove Blink 182!! Lets work together on this. For the intro, we know that our starter sentence needs to be a Hook, or something that will grab the reader's attention. So think of a small factoid or question to ask/tell the reader.
I can continue to help you out in the comments :)
The killers view their victims as children. The victims we're four children and traveled as a group after finishing their sunday lessons. The children had gone to the basement and wanted to change into choir clothes and they we're killed.
No, because the author describes Booth's thorough premeditation of the murder.