Juan Vallejo Corona aka "The Machete Murderer" was California’s most prolific serial killer and held the record for the most murder convictions until the arrest and trial of Chicago serial killer John Wayne Gacy. Corona was convicted of killing 25 migrant workers although the number is believed to be much higher. He buried the victims remains in orchards around Yuba City, CA. Corona still holds the record for the most murder convictions in the state of California. Juan Corona died of natural causes on March 4, 2019.

Five page copy of a 1999 incident report when Corona was attacked by inmates who breached security and accessed the protective housing yard. This is the incident when the guitar Charles Manson was playing was broken over Juan Corona's head.

Juan Corona Charles Manson 1999 Injury Report