Leandro Acosta, 25, and his step-sister and lover Karen Klein, 22, admitted murdering their parents Ricardo Klein, 54, and Miryam Kowalczuk, 52, as revenge for "years of sexual abuse".
Acosta's lawyer Monica Chirivin has recounted the horrific event.
Acosta confessed he had been planning the gruesome murders of his step-father and mother for some time.
"It tasted like pork, a tad salty but delicious"