It's a simple silver circle with a 5-pointed star inside. Right at the top of their page.
Not saying that gold badge wtih the eagle in the OP isn't also a badge design that has been used by the Marshals, but I do believe most of the time I've ever seen any real Marshals, they have the silver circle with 5-point star badge.
When I looked into this earlier this morning & looked at the original, higher-res image, I could definitely tell it was capitol police & NOT USM.
Only thing I'll nitpick is the OP isn't totally accurate; Just go to the US Marshal's homepage & their badge design is right at the top:
https://www.usmarshals.gov/
It's a simple silver circle with a 5-pointed star inside. Right at the top of their page.
Not saying that gold badge wtih the eagle in the OP isn't also a badge design that has been used by the Marshals, but I do believe most of the time I've ever seen any real Marshals, they have the silver circle with 5-point star badge.
When I looked into this earlier this morning & looked at the original, higher-res image, I could definitely tell it was capitol police & NOT USM.