She would pull that pistol on escaping slaves who were having second thoughts about the danger of what they'd signed up for, to make them keep going. She would drug babies to keep them quiet, because that's what's up and no one wants to get the whole group caught because of a crying baby.
Also, yeah, sure, she "found" the saber. That was a trophy, and like a real gangster, she didn't say a word. She just showed up with it one day.
Look at her face. She's not mean or unkind, she cares a lot, but she didn't fuck around. Neither should you.