"So that's it? You disappear for four years and you suddenly come back, regroup with us and make plans to take down a propane salesman?" Bentley asked, confused.
"Not exactly. He's actually selling a modified, and illegal, mind you, version of propane to arsonists, terrorists and what have you," Sly explained.
"How did you even find this out?"
"Well, I may have gotten confused when grilling a steak and burned down my house...but still!"
"How does that link you to hi-"
"It doesn't matter, all that matters is that Hank Hill and his evil scheme needs to go!"
"Are you sure we need another family trying to get revenge on us for what we may have done?"
"Well, his father died, his mother is insane and he has a son that's too lazy to even do anything about it. Not to mention that his wife is also insane."
Bentley turned to his computer, typed for a moment and paused, staring at the screen. "It says here that he works at Strickland Propane in Arlen, Texas while living on Rainy Street with is average suburban family."
"It's a front I tell you!"
"Sly, I think you're going insane."
"Come on, it's just one more job we need to pull off here!"
"But he's just a propane salesman! And besides, you can't modify propane!"
"Well, his neighbor steals bridges for a living, can we do something about that?"
"Fine, I'll get the rest of the gang and we'll relocate to Arlen to do more research on Hill. If you're wrong about this, I will be beyond infuriated."
Later that month, buildings all over Arlen were destroyed through arson and terrorism.
"Is this enough proof that Hank Hill is a bad guy?" Sly asked.
"Just, just get him," Bentley commanded.
Sly then proceeded to beat Hank Hill unconscious.
Later that day, the Arlen police officers discovered Hank lying on the ground outside the station with a note on him that read, "I am the one who sold the illegal propane to the arsonists and terrorists."
"Seems legit," one of them said, carrying Hank into the police station.