Police discovered that McMichael had purchased the two water buffaloes at auction on July 10, a day before the attack.

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Opening up about the fateful day, McMichael's fiancée, Jennifer Green, 44, tells PEOPLE that the couple ate breakfast together that morning and last spoke on the phone at roughly 10 a.m. local time.

An Oklahoma man died Friday after being attacked by two water buffalo he had purchased the day before. Police in Jones, Oklahoma first got the call that Bradley McMichael had been attacked by the ...