Nazi persecution, arrests, and deportations were directed against all members of Jewish families, as well as many Gypsy families, without concern for age.
Homeless, often orphaned, many children had frequently witnessed the murder of parents, siblings, and relatives.
He then proceeded to inject chloroform into their hearts, killing them instantaneously.
Mengele then began dissecting and meticulously noting each and every piece of the twins' bodies.
As a blanket punishment, he then sent to the gas all people from that transport who had previously been selected for work, with the comment: "Away with this shit!
" (Robert Jay Lifton, The Nazi Doctors.)There were moments when his death mask gave way to a more animated expression, when Mengele came alive.
Twins undergoing his experiments didn't know what the objectives were.
It is known that he had a special pathology lab where he performed autopsies on twins who had died from experiments. Any remaining notes Mengele carried with him on his escape to South America and those were never found.
In 1937 he joined the Nazi party, then in 1938 he went to the SS.
In 1942 he was wounded at the Russian front and was pronounced unfit for duty.