Walt & Jesse are forced to destroy their RV when a break in Hank Schrader's "Blue Sky" meth case leads him to Jesse. Given his conversation with Hank, it can be believed that Old Joe has a fairly extensive legal knowledge. Not only does he hold his ground against Hank, he also helps to delay his search by making him get a warrant. When Hank is led away by a phony phone call by Saul Goodman, Old Joe destroys the RV. ("")
Walt, Jesse, and Mike Ehrmantraut visited Old Joe to borrow a giant magnet from his junkyard to destroy Gustavo Fring's laptop inside the police evidence locker. He sells them the magnet, 42 car batteries and an old truck to transport the magnet. ("")
- Joe is well educated in law. He used his knowledge against Hank when defending Walter and Jesse ("").
- He also appears to have a working knowledge of engineering, as he is able to set-up the large electromagnet that Walt, Jesse and Mike use to erase Gus' computer from outside the DEA storage vault ("").