He swears he will fight on the side of the Order, and Lupin and Shacklebolt eventually accept him. Most of the others don’t. Potter and the Weasleys want nothing to do with him, and Moody hates him so much he refuses to even question him. "Send him back," Draco hears Mad-Eye yelling at Lupin. "He’ll sell us out as soon as he gets a chance."