Jessica and Ashlee Simpson's father could serve up to six months in jail after his drunken driving arrest
Credit: Ramey

Joe Simpson was charged on Tuesday with two misdemeanor counts of driving under the influence.

The 54-year-old father of Jessica Simpson and Ashlee Simpson was arrested on Aug. 4 after he was pulled over at approximately 10 p.m. on Ventura Boulevard in the Sherman Oaks area of Los Angeles.

“He had had a couple of glasses of wine at dinner with his wife. They were driving home and he went through a check point a few blocks from the restaurant,” a source close to Joe Simpson tells PEOPLE.

“He took a breathalyzer voluntarily thinking nothing of it. He was surprised to know that he was over the limit. He learned a very important lesson from it all.”

If convicted, he could serve up to six months jail time, pay a $1,000 fine and face 36 months of probation, the Los Angeles City Attorney’s office tells PEOPLE.

Simpson, who spent the night in jail following his arrest, was reportedly released at 9:41 a.m. the next morning.

His arraignment is scheduled for Aug. 30 in L.A.