Reading assinment for week of april 20

I am reading Things Hoped for by Andrew Clements

A prediction of what i am going to read
I predict that Guen's grandfather turned invisible! The reason why i think that is because. Guen went to the Nike store with her friend she no's from music class because he wanted new runnins shoes . So they went in and he started staring at this wall and he said to Guin look at the wall and tell me what you see. She said is see a shadow of a boy with a beard and spikey hair looking around . He said ok now find him out of the people in the store she looked everwhere and could not find him she looked back at the wall and say nothing. Then they walked out of the store and he toled her a secret it was a few years ago i turned invisible and noone could see me for a month and Robert the boy thinks that guy was invisible. That is why i think he is invisible because 2 other people have turned invisible before and i think he did.
Questions and thoughs i had when i was reading
my prediction was not right! he did not turn invisible They went down to the freezier and say him in there! when i read this ithought why is he in there who did it? did he do it ? they did not no so they are calling the police.