A newly released letter from two decades ago revealed why rapper Tupac Shakur broke up with singer Madonna.
In 2015, Madonna claimed she dated the rapper before his death in 1996—but she didn’t explain the reason for their breakup.
Tupac wrote the letter while he was in prison.
“I haven’t been the kind of friend I know I am capable of being,” wrote Shakur, who spent time in prison for abuse, Rolling Stone reported.
TMZ published portions of the letter he wrote to her while at the Clinton Correctional Facility.

A wall dedicated to the memory of U.S. rapper Tupac Shakur is seen on May 26, 2016, in Los Angeles, Calif. VALERIE MACON/AFP/Getty Images