At the beginning of the show, Chance kills Brooks while posing as Zippy Heat & Air Conditioning employee. Chance just walked in, shot him dead and walked out.
Around 30 minutes in, there is a mention about storm door that almost said as if it is hidden.
Ilsa finally approved what Chance did, yet, Chance himself is being assured that he had a good reason why he did what he did. Sp my guess is, Chance did not know that he did something right. If he in fact did the right thing by have Brooks killed, and his wife re-opening the reason that have him killed, would it be a good reason to have his wife killed too for the same reason?