What happend to jem scout and dill when they snuck to the back of the radley house to peek inside?

jem scout and dill all go up to the radleys door to seeif they can see boo(arther) radley. as they were looking in the window they saw a shadow and they all ran in the collard patch. jem lost his pants from climbing under the fence and had to go back to the radletys yard to get his pants back. he tells scout to count to 10 and he will be right back before he gets back. as scout was counting she heard a gunshot and thought that mr radley had shot jem.