Karrueche Tran 'worried' for Chris Brown after arrest: Rihanna's ex kicked out of rehab, violates probation, model thinks jail time could 'kill Breezy'

Chris Brown is back in jail AGAIN - and (ex) girlfriend Karrueche Tran is really worried about him.

Reports confirm that Breezy was jailed on Friday (March 14) after getting kicked out of an LA rehab. It remains unknown what his new offense is, but rumors suggest it's drug related. 

Authorities took the troubled singer into custody for "a probation violation related to his conviction" in the 2009 domestic abuse case involving Rihanna. 

Superior Court Judge James R Brandlin issued an arrest warrant after finding out that Breezy "failed to comply with rules and regulations of the program." The "Fine China" crooner was allegedly "cooperative" with arresting officers.

He remains in jail without bail until a court hearing on Monday. The LA County Sheriff's Office issued this statement:

Los Angeles County Sheriff's deputies were made aware of a warrant for the arrest of Suspect Chris Brown on Friday, March 14, 2014. At about 2:00PM, Malibu/Lost Hills Sheriff's deputies arrested Suspect Brown for the warrant at a location he was staying at in the city of Malibu. Mr. Brown was cooperative when taken into custody. He is being held without bail at the Inmate Reception Center of the Los Angeles County jail in downtown Los Angeles. The warrant was issued related to assault with a deadly weapon and criminal threats crimes which occurred on February 7, 2009, in the City of Los Angeles. The incidents were investigated by the Los Angeles Police Department and prosecuted by the Los Angeles County District Attorney's Office. The warrant was issued for a probation violation related to his conviction.

And although Karrueche Tran's no longer dating Breezy, she still cares about him. She's now worried about his well-being, and doesn't think he can take much more drama. Especially now that he may face four years in prison:

"If Chris gets locked up, it will be the single most devastating blow to his career, his future and his life. Chris, flat out, cannot be told what to do and hates following orders," a source tells HollywoodLife.com. "Karrueche thinks he life would be over, literally over - like he would do the unthinkable - if he had to go down for that long of a time. It would kill him."

What do fans think about Tran's fears?