Paris Hilton's brother sent to jail

Paris Hilton's little brother Conrad Hilton is heading to jail after failing a series of drug tests.

A Los Angeles federal judge revoked the 22-year-old's probation and sentenced him to two months in prison on Monday (06Jun16) after he was kicked out of a substance abuse program.

"The U.S. Attorneys Office was satisfied with the sentencing and two months was the recommendation we made in court," Assistant Attorney Alexander Schwab tells Entertainment Tonight.

"Conrad has 48 hours from noon... to report to jail. He has to report to the custody of the Bureau of Prisons. The U.S. Marshals Service will arrange exactly where he will report to for his time."

Sources tell the U.S. news show Conrad was emotional and "in tears" as the sentencing was announced. His parents Rick and Kathy Hilton were in the courtroom for the judge's ruling.

Hilton was given three years probation and 750 hours community service in 2014 after pleading guilty to attacking several flight attendants during a British Airways flight from London to Los Angeles. He had to be restrained after becoming violent onboard after allegedly smoking marijuana and cigarettes in an airplane lavatory.

Conrad's attorney, Robert Shapiro, attributed his client's behavior to a bad reaction to a sleeping pill.

Last year (Jun15), he was arrested again on suspicion of violating a restraining order obtained by his ex-girlfriend, Hunter Daily.

A judge ordered Conrad to check into a residential substance abuse treatment program in January (16) after he failed a series of drug tests.

During Monday's sentencing hearing, he asked the judge if he could serve his time under house arrest at his grandfather's Palm Springs, California home, insisting his family's Los Angeles pad was a "bad environment" for him.