Oh! I know the answers now!
Which animatronic caused the bite of '87? Trevor.
Who was the victim of the bite? George W. Bush.
Who is the purple guy? Uncle Ruckus.
What happened to the 5th missing kid? He got better.
The bite of '87 was caused by: Mike Tyson
The victim was: George Lucas
The purple guy was: Roman Polanski
And the 5th child: Moved to Florida
Hey, it's like madlibs!