The actor, who played Screech in the popular 90s comedy, is said to have been involved in an incident in Wisconsin with his girlfriend and another couple.
Dustin was reprimanded in Ozaukee County early on Boxing Day on suspicion of possessing a switchblade, carrying a concealed weapon and recklessly endangering safety.
Police were called to the Grand Avenue Saloon bar in Port Washington late on Christmas Day following reports of an altercation and stabbing, police told local Fox affiliate WITI.
Dustin, 37, and his girlfriend were both apprehended at their home shortly afterwards.
While he remains in jail at the time of writing, she was charged with disorderly conduct and later released.
He is being held on a $1000 bail.
A video said to feature Dustin during the incident has been released on the internet.
According to TMZ, things became heated when Dustin noticed a couple taking photographs of him at the bar.
Dustin took part in Celebrity Big Brother in 2013 and was the fourth housemate to be evicted.
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