Republican presidential candidate Ben Carson's recollection of being offered a scholarship to the U.S. Military Academy at West Point was questioned on Friday, potentially damaging the credibility of the 64-year-old retired neurosurgeon.
Also on Friday, Carson's account of how he attempted to stab a friend in his troubled youth came under renewed scrutiny.
Carson, a favorite of conservative activists who is tied with Donald Trump at the top of Republican primary polls a year before the November 2016 election, has on the campaign trail often recounted both tales from his 1990 autobiography as he trumpets his rise from poverty in inner-city Detroit to the highest echelons of medicine.