You are describing the loop of plastic audio wire poking out of his shirt as a keyring there. You can look up higher res copies of this image. Duckduckgo had two different, higher-resolutiot copies right at the top of the page of this guy. It’s supposed to be hard to spot them, otherwise they wouldn’t exactly be doing a good job, yeah? Also, this picture specifically is being shown because the guy was confirmed to be an undercover cop. It was during the George Floyd protests.