If future employers of your bf will google him or do a background check they might find his conviction/sentence/crime. So going forward this is going to be difficult. If you morally don't have a problem with that, go ahead, support him during his prison stint and expect some “repercussions” later on (not getting employment, etc.. Not saying this will happen, but it could. Everyone makes mistakes and prison is a harsh punishment so it wasn't like stealing an elderly lady's purse… He might put you in “danger” in the future if he continues this path but only you can make this decision going forward.
And the brains apparently
If future employers of your bf will google him or do a background check they might find his conviction/sentence/crime. So going forward this is going to be difficult. If you morally don't have a problem with that, go ahead, support him during his prison stint and expect some “repercussions” later on (not getting employment, etc.. Not saying this will happen, but it could. Everyone makes mistakes and prison is a harsh punishment so it wasn't like stealing an elderly lady's purse… He might put you in “danger” in the future if he continues this path but only you can make this decision going forward.