WAS PARANORMAL ACTIVITY REAL OR NOT?

IF PARANORMAL ACTIVITY IS NOT BASED ON A REAL STORY Y AT THE END IT SAYS MICAH WAS FOUND DEAD AND KATIE WAS NEVER FOUND BY THE POLICE AS IF THATS WAT HAPPENED IN REAL LIFE??!! AND UP UNTIL NOW I WAS TOLD IT BASED ON A REAL TRU STORY AND NOW I GOOGLED IT AND IT SAYS ELSE, OK IS IT A REAL MOVIE BASED ON A TRU STORY OR COMPLETELY FICTIONAL????