okay no but now I'm really thinking about it, right
it's canon that Maggie had no idea IYS denied Sam's cancer treatment, that's the only reason she stayed friendly with Blackpoole. So au where instead of letting his life fall apart, putting together the team, and then taking down Blackpoole, Nate decides to echo current events and just. Fucking shoots his boss.
and Maggie has no clue why.
maybe he succeeds, maybe he doesn't, either way he goes to jail for this (he was not planning to get away with it). And Maggie's just lost her son, now her husband's an (attempted) murderer and in prison, she's on her own and has no answers for any of this.
she might not directly have Nate's contacts and experience, but he had to have talked about these cases, she knows who a few of these people are through him. But she also has her own connections through the art world - like, Parker and Sophie at least have to be talked about by appraisers, collectors, people who work with the things they steal. And she has Sterling, who while still probably not helpful for breaking the law at least likes her more than he likes Nate and might be able to get her some more information. Like why the fuck Nate did what he did.
And she's not a mastermind, she's not Nate's level of manipulative and three steps ahead of everyone else, but she doesn't need to be. She's smart and charismatic and quick to put pieces together (the fucking button camera scene). So. She figures it out.
And then she has to decide what to do about it.
She's not going to be able to exonerate Nate - he shot a man in broad daylight and fully admitted it. She might be able to break him out of prison if he's up for being on the run, but that's a matter of hot debate between the two of them right now. (She could totally do it, especially with the team, she and Sophie are just waiting for him to stop being overprotective.)
(side note: nate's face when he finds out his ex wife and international criminal not-technically-an-ex are running a team together while he's stuck in prison? priceless)
but what she can do is protect other kids like Sam. Seek out corruption, find the people being hurt, and with her team, stop the people responsible from ever doing it again.
she just needs to create a little bit of leverage.