Who was Joel Cauchi? attacker who targeted women in Sydney mall

Australian authorities announced on April 15 that they are investigating the circumstances surrounding a tragic incident on April 11 in which a 40-year-old man, Joel Cauchi, who was known to have mental health issues, went on a rampage in a shopping mall, wielding a large knife. Cauchi's violent spree resulted in the deaths of six people and left many injured.