Paris Hilton’s younger brother Conrad has been ordered to spend 90 days in a a substance abuse treatment program for violating the terms of his probation.

The Hilton hotel heir was put on probation last year. Hilton pleaded guilty to a misdemeanor assault charge after an incident aboard a British Airways flight in which he reportedly threatened flight attendants and repeatedly went to the plane’s bathroom to smoke pot and tobacco.

He was given three years probation and 750 hours of community service.

#ConradHilton escapes jail time again! Why is he not behind bars?! https://t.co/3JJva2yc2E pic.twitter.com/k7PzDE0p97

— Nancy Grace (@NancyGraceHLN) January 28, 2016

Hilton was also arrested just a few months after the flight incident on charges of violating a restraining order against his ex-girlfriend.

According to authorities, Hilton broke the terms of his probation by failing several drug tests, failing to complete required treatment programs, and traveling out of state without authorization.

Paris Hilton is carrying on, it appears:

Have a beautiful day ?

A photo posted by Paris Hilton (@parishilton) on Jan 28, 2016 at 10:08am PST