Thou shalt not bear false witness...... Exodus 20:16
"Jerome Bolsec, an ex-Carmelite friar who embraced the reformed faith in
Paris, settled in Geneva and served as a physician. He publicly attacked
Calvin’s doctrine of predestination, was banished from Geneva, and
eventually returned to catholicism.
His “revenge was to publish in 1577 a
scurrilous biography of Calvin, accusing him among other things of
sodomy, which 
continued to be an arsenal for anti-Calvinist polemics for
the next two centuries” (Lindberg, 266).
The more specific charge, to which reference is now made, was formulated
thirteen years after Calvin’s death, by Jerome Hermes Bolsec . . . that
Calvin had been convicted of heinous moral turpitude . . . No evidence
has ever been produced of the existence of such a document as Bolsec
alleges.
*Jacques Desmay, the earnest Catholic writer who used his stay
as Advent and Lenten preacher at Noyon in 1614 and 1615 to learn all he
could of Calvin’s life there by records and tradition, found nothing of
it. An equally determined Roman historian of Noyon, Jacques Le Vasseur,
in his Annales of 1633, expressly repudiated it; and careful modern
Roman Catholic scholars, such as Kampschulte and Paulus, reject it as
“unworthy of serious refutation."
Dr. Moulin observes, that not one of Calvin’s innumerable enemies ever
carped at the purity of his life, but this profligate physician, whom
Calvin had procured to be banished from Geneva, for his wickedness and
impieties."
DaveArmstrong