Okay, so let me present an alternative story. I don't think that's what necessarily happened, but it's just for the sake of making a point, so humour me for a bit, alright?
Now, which story do you think is more plausible? That or her being a ringleader who organised a mob of rioters to attack Pelosi's office and stole her laptop in order to deliver it to Russian Foreign Intelligence Service? At the ripe old age of 22.Williams went to the Capitol to "take part in the revolution" with her friends (you're unlikely to do something like that alone) for whatever reason, whether it was because she got caught up in the alt-right conspiracy theories and general fearmongering about the left or anything else. When people started pushing past police lines and breaking in, she and her friends joined the mob and joined a group who were heading for Pelosi's office. Along the way she gave directions to her friends to not get separated. While in the office, she or one of her friends happened to find a random laptop and stashed it. They hang around the Capitol until the mob was pushed out by the cavalry.
When they got home, they posted some videos of them in Pelosi's office and maybe bragged in a chatroom or somewhere how they had gotten their hands on Pelosi's hard drives or something like that and then spitballed what to do with the laptop using typical edgy adolescent "humour" that's common online, rife with hyperbole and exaggeration in the vein of, "Let's sell it to Russia, I know a guy who lives there." And maybe they talked about how they should just smash it or something.
Some mutual acquaintances of her and her ex who were in the chatroom told about it to her ex who, in righteous anger and taking it at face value, went to the FBI and told them about everything they had heard without really knowing what had actually happened -- how she must have stolen a laptop or maybe a hard drive and tried to sell it to Russia and maybe had destroyed it or maybe not. Then, when the FBI published a Statement of Facts in the case including all the salacious accusations, the media picked it up and upon visiting her mother and hearing how she had not been home, jumped to the conclusion she must be on the run from the FBI (she actually surrendered to the authorities the very next day they started searching for her) and did you hear about how she was trying to sell the laptop to Russia!? Allegedly.
No doubt we will hear more details of the case, but there is this thing called Occam's razor to apply in situations like these -- when there are two theories that equally explain all the facts, there is no reason to prefer the more far-fetched one that is much more unlikely to occur.