Surveillance footage shows the attacker breaking into the Pelosis’ home.

Capitol Police surveillance video from outside former Speaker Nancy Pelosi’s home in San Francisco, released publicly on Friday, shows the man who attacked her husband in October breaking in.

Before he does that, the attacker can be seen peering into the dark house, walking away and then returning with bags, which he rummages around in for more than two minutes.

Shortly after 2 a.m. local time — the time stamp on the video says 5:10 a.m., which would be consistent with the Eastern time zone, where the Capitol Police force is based — the assailant starts trying to smash a window or a door with what appears to be a hammer. It takes him about 30 seconds of repeated strikes to break through, at which point he climbs into the house and the footage ends.

The surveillance video shows two key things.

First, it indicates that the attacker was outside the Pelosis’ home for several minutes before he entered, meaning it might have been possible to prevent the attack had the Capitol Police been monitoring the surveillance camera in real time.

Second, it unequivocally dispels a baseless conspiracy theory that began circulating soon after the attack: that the suspect, David DePape, had not broken in but rather had been invited in and then got into a fight with Mr. Pelosi.

The New York Times reported on Nov. 1 that the Capitol Police were not monitoring the video feed from the Pelosi home in real time, and that costly minutes elapsed before Capitol officers saw the break-in.