where is sponge in chapter 4?
 

heeeeeeeeeeeeeeeeellllllllllllllllllp meeeeeeeeeeeeeeeee plz:(:(

Upon the evidence table... pretty sure you get it automatically when you need it.

Yeah, you wont need it until half way into the game(maybe later) but you arent able to get it until you absolutly need it(trust me you will know when)