According to Techcrunch, it has been done (after the expulsion evidently):

We asked Jake Williams, a former NSA hacker who founded cybersecurity and digital forensics firm Rendition Infosec, to examine the metadata embedded in the photos. The photos, taken from her iPhone, contained a matching date and time for the alleged hack, as well as a set of coordinates putting her at the Mark Twain House.

While photo metadata can be modified, Williams said the signs he expected to see for metadata modification weren’t there. “There is no evidence that these were modified,” he said.