His death was politicised when President Donald Trump erroneously said his predecessors had neglected to make condolence calls to the families of fallen USA soldiers.
Additional remains of a US soldier killed in a mysterious Niger ambush were reportedly found in the African nation earlier this month - even though his funeral had already been held, with his widow questioning whether he was even in the casket. The Armed Forces Medical Examiner on Tuesday positively identified them as those of Johnson, White said.
Further remains have been recovered of a U.S. soldier killed last month in the West African nation of Niger, the USA defence department says. But later reports suggested children found Johnson's body, with his hands bound and a large gash on his head.
The Pentagon has not confirmed those reports as it awaits the results of the official investigation that is expected to be completed early next year.
Army Maj. Gen. Roger Cloutier, a career infantry officer, Iraq veteran and the chief of staff to Marine Gen. Thomas Waldhauser, commander of U.S. Africa Command, is leading an Article 15-6 fact-finding investigation into the firefight in western Niger near the Mali border.More news: Federal court puts stop to Trump's transgender military ban
What happened to Johnson and how he became separated from the rest of the Green Beret-led team after it was attacked is one of the key mysteries surrounding the incident.
La David Johnson about a month after he and three other American soldiers were killed in the ambush, CNN reported Tuesday.
The soldiers were part of an operation to train local forces to combat the Boko Haram terror group, which has ties to the Islamic State and al-Qaeda.
Black, Jeremiah Johnson and Wright were killed alongside six Nigerien soldiers during the October 4 firefight, according to the Pentagon. Five Nigerien soldiers were also killed in the shooting, which broke out as the soldiers left a meeting with local officials near Tongo Tongo. The team became separated during the firefight, U.S. officials and a Nigerien soldier told CNN. US-Nigerien forces managed to kill 20 militants during the firefight according to a defense official.
The Pentagon is investigating his death, together with those of staff sergeants Bryan Black, Jeremiah Johnson and Dustin Wright. La David Johnson, questions still remain as to how he was killed, and what was in the casket his wife hovered over and said her last goodbyes to in October.