Los Angeles County Sheriff's Department/AP
's younger brother, Barron, was formally charged with DUI and being an unlicensed driver, the Los Angeles District Attorney's Office announced Thursday.
The charges stem from his Feb. 12 arrest
Four misdemeanor counts were filed in total, which include driving while having a .08 percent or higher blood-alcohol level, and unlawful use of a license (he had a fake I.D., sheriffs confirmed).
Hilton's arraignment is set for April 14. He faces a maximum penalty of six months in jail for each count.
Last month, Hilton was driving a black Mercedes on Pacific Coast Highway just before 8 a.m. when another motorist observed him driving erratically, sheriffs said.
When Hilton stopped, the other driver had him sit on a bus bench until deputies arrived.
Hilton's blood-alcohol level was tested at .14 percent, sheriffs said.
Paris Hilton famously served time in jail
last year for violating probation in an alcohol-related driving case. She was charged with DUI in September 2006.