Scp-6000 aka milkman

Scp-6000 is a creature that shape shifts,it usually takes the form of a 6ft tall milkman,scp-6000 is in a maxium security chamber,if scp-6000 escapes,lure it back in with milk,remember it likes milk,there is a fridge outside of scp-6000's containment chamber,rumor has it that scp-6000 used to be a human that had a job working as a milk man,but nobody knows the true origins of scp-6000