Another article tells a lot more and says that an informant told them that the husband told him/her where he buried Sue Ann. The informant could very well be the brother. The husband probably didn't think his brother would tell. The brother is probably offered some type of a deal with LE on his current arrest and decided to save his own neck and talked his head off
I'm just so glad that Sue Ann has been found. This case has weighted heavily on my heart for some reason. Glad the arrogant creep was arrested. LE didn't waste any time arresting him

I'll bet he isn't strutting around his jail cell.
He knows he is going away for a long long time.