My guess is some leather dye came out. Yes, wet leather smells bad for some reason, it gets better when it dries out. One week is about right for thick cop jacket leather. When I wash old jackets I make sure I knead them well to get all the crap out when wet. Loads of dyes come out.This old CHP I got a while back has been a bit smellier than I like, so I gave it a soak and wash in the bathtub with some Castille soap. It's probably the liner causing the smell more than anything. Jacket was obviously heavily worn and probably never cleaned by the original owner, some CHP biker cop I assume. It's drying out now but the smell is even worse than before I washed it, have I awoken some demonic entity from within the jacket or will the smell dissipate when it's fully dry? I expect it'll take a full week to completely dry. Also, a load of blue dye came out of the jacket in the tub. Is this chrome salts from the tanning process or residual leather dye? The jacket is probably 50 years old, if that helps.