Pipe Bomb Cover Up Explained

"Footage of the capitol hill area of the alleged bomb shows a man in a backpack approaching nearby police and Secret Service to tell them that there is a bomb a nearby bench in the DNC. That man, was later revealed, was a plain-clothed capitol police officer. The officer's in the video do not immediately react when they are told this alarming information. Now keep this in mind, Vice President Kamala Harris is actually inside of the building at this time. They are supposed to be on high alert....
The facts we can take away are this:
The cops were tipped off to the presence of the bomb by an undercover cop in a hoodie.
That did not appear at all alarmed even though the VP was inside the building.
Three years later, nobody knows who this man was and they also don't know who planted the bomb.
The two bombs were allegedly placed 17 hours earlier. The two pipe bombs were equipped with one hour mechanical timers. So while they included live explosive material if they were planted 17 hours earlier, they were never actually seriously armed to explode.
They were able to catch MAGA grandmas and people wearing masks who walked through the capitol but they can't find someone who allegedly tried to bomb it?
This is not a viable explanation. Perhaps the reason the police didn't react is because they knew it was BS."