They probably thought they had more time. Didnt expect the govt to figure out who they were so fast in a crowd full of people. And leaving the country cost money. Maybe they didnt have an extra $3000 to hop on the next plane to Russia. Most criminals don't effectively plan an exit plan anyway.
3 grand is not that much money n*gga. if youre planning on k!lling a large amount of people, they could at least work for a few months beforehand to save up. im sure they planned this months beforehand anyways. they shoulda gotten on a plane that night and been out and never found. why the fu*k would they be in Massachusetts blows my mind. it seems like they were waiting to be found, if youre not gonna leave the country atleast leave the state.