And there are reasons why many of the initial stories relied on the outdated ones.
https://www.poynter.org/2012/the-iconic-photos-of-trayvon-martin-george-zimmerman-why-you-may-not-see-the-others/168391/
This is not a liberal conspiracy.
You have to own the rights to the photo or have permission to publish it. Few outlets did. When they obtained the newer ones, they ran those, too.