"America's Got Talent" contestant was not vetted, says source

(CBS/AP) A person familiar with the production of "America's Got Talent" says a background check wasn't conducted on Timothy Michael Poe, an Afghanistan war veteran who is under scrutiny for his claims of battle injuries.

Read More: No record of "America's Got Talent" singer injured in combat, says Minn. National Guard

The person, who wasn't authorized to discuss the issue publicly and spoke to the Associated Press on condition of anonymity, said Wednesday that Poe was one of about 4,000 people who vied for a spot on the NBC series, which doesn't vet contestants until they reach the ranks of the top 48.

On Monday's episode of "America's Got Talent," Poe described serious injuries inflicted by a grenade in Afghanistan in 2009. But a Minnesota Army National Guard spokesman said records for Poe don't reflect such an incident.