Dog the Bounty Hunter‘s son Garry Chapman — who was fired, then reinstated, from a police force in Alabama last year — is suing the department … He says they only disciplined him to teach him a lesson for calling out a dirty cop.

Remember … Chapman’s employment was terminated last year after his involvement in a fatal high-speed car chase. He was later reinstated, but he says he should’ve never been fired in the first place.

In court documents, obtained by TMZ, Chapman alleges the police department, along with Priceville, Alabama, Mayor Sam Heflin, used the tragic incident as an opportunity to smear his name and get rid of him — something Chapman alleges they were working on for some time.

When the tragic accident came along, Chapman says the mayor and police department purposefully made him the face of it, thus vilifying him and causing him “catastrophic reputational harm.”

Chapman says he subsequently lost out on a promotion and has been unable to secure other employment in law enforcement because no agency wants to hire an officer whose name is in national headlines for a fatal incident.

Penn & Teller’s magic act vanished from Las Vegas this weekend … Penn Jillette was sidelined due to an ankle injury.

Penn took to Facebook to announce the news Saturday, writing, “We are sorry to have to cancel this weekend’s shows. I broke my ankle yesterday and on doctor’s orders, I am not able to do the show.”

He added … “Thanks so much for understanding and we hope to see you soon.”

Of course, the iconic duo has been wowing audiences for 50 years now, performing nearly 300 live shows every year. Their show was called “The single best show in Vegas” by the Los Angeles Times, and their hit series “Penn & Teller: Fool Us!” — where up-and-coming magicians try to fool the famous pair — has been renewed for a 12th season.

The good news is, tickets are still on sale for this upcoming weekend, suggesting Penn expects a quick recovery.

Some guys have plenty of confidence in their old friends … can you guess who this former professional wrestler is?

We ran into this dude while he was signing autographs and asked him if he had any advice for his old pal John Cena as he prepared to leave the ring behind … but he was confident his buddy had a pretty bright future outside of wrestling.