Original sentence: Jefferson was alleged during his administration to have fathered several children with slaves; more recently DNA tests indicate that a male in Jefferson's line, possibly Thomas Jefferson himself, was the father of at least one of Sally Hemings's children
Edited sentence: Jefferson was alleged during his administration to have fathered several children with slaves; more recently DNA tests and circumstantial evidence indicate that Thomas Jefferson (or perhaps a male in Jefferson's line), was the father of at least one of Sally Hemings's children