Lanez had to be airlifted to a hospital after he was stabbed by another inmate at a California prison this week, his father said Wednesday.

The motivation for the stabbing remains unclear and the rapper’s stabbing injury is non-life-threatening, the outlet reported.

“Mr. Peterson was never given a fair trial, free from bias, political interference and media-driven pressure,” said Gianno Caldwell, according to reports from Fox 11.