Initially held in connection with the murders of five women in February 2003 , he later confessed to killing more than thirty women .
Petrovs , the son of a prominent medical doctor , had been homeless for several years .
Initially held in connection with the murders of five women in February 2003 , son later confessed to killing more than thirty women .
Petrovs , the son of a prominent medical doctor , had been homeless for several years .