Metallica‘s Kirk Hammett has reflected on how notorious US serial killer Richard Ramirez was on death row when the band filmed their ‘St Anger’ video at California’s San Quentin prison.The band filmed the acclaimed video at the prison in 2003 while Ramirez was serving a death sentence after being found found guilty in 1989 of 43 crimes, including 13 counts of murder.Recalling the shoot to Kerrang!, Hammett reflected on how he even received a memento which was linked to the notorious killer.“I