HERE IS WHAT WE KNOW: In 1979, Ana Mendieta, a young, up-and-coming artist fresh off a solo show at the feminist co-op A.I.R. Gallery, met the older, more famous Carl Andre, a so-called founding father of Minimalism. The artists embarked on a romantic and, by several accounts, tempestuous relationship. In 1985, Mendieta died after falling from the window of Andre’s thirty-fourth-floor apartment in New York’s Greenwich Village. He was tried, and acquitted, for her murder. Now eighty-seven, Andre—still living, somewhat astoundingly, in that same apartment—has carried on with his career, exhibiting