Losing it for life is too drastic and isn't what any behavior specialist would suggest.
There needs to be a path to earn it back. For example, hours of community service based on the offense and that increase with each offense.
It would also want to incentivize future legislatures excluding people by targeting groups. The drug war and its imbalance towards treatment of minorities as an example.
I would expect you'd be in prison for at least five years so are you suggesting you've killed someone while in prison or that basic income is the only punishment?
In any case, I am not suggesting anything concrete here, just going forward with the thought experiment. Basic income first, then we can work on how to use it as a deterrence.