The insurrectionists needed a few, maybe 12 to 20, Capitol Police to allow them to cross onto the lawn. They knew before the day that these Police were with them and would let them through. Here we see one guy chumming up to a Capitol Police Officer in order to add one more to the list of "turned" Capitol Officers. We can see this being realized in the video of the event. Riley was groomed by Hiles to gain access without creating a scene too early. After the event Hiles has sought to keep Riley implicated to save his own skin. No wonder Riley is embarrassed.