Producer Johnny J, most popular for his extensive work on Tupac's All Eyez On Me album, died while in custody at the Los Angeles County jail on Friday (October 3). His death is being considered a suicide.

According to TMZ, Johnny J (real name: Johnny Jackson) was in jail for a DUI charge. Authorities say he took his own life by jumping off a tier in the jail.

He was just 39 years old, and leaves a wife and two children.

In early 90s, the Mexican-born, Los Angeles-raised producer first gained notoriety after producing the hit single "Knockin' Boots" for his Berklee College of Music classmate Candyman. Following the success of the single, he met Tupac and worked with the legendary rapper on his Thug Life album, the Above The Rim soundtrack, and the rest of the late rapper's projects up until his death.

Johnny J produced classic Tupac tracks such as "How Do U Want It," "All Bout U," "Picture Me Rollin'" and "Hit Em Up."

He was also the owner of his own Klock Work Entertainment.