might do it again

Are these sentences correct:

[color=red]1-He has stolen a car and so might steal a car again.
[color=darkblue]2-He has stolen a car and might do it again.
[color=indigo]3-He has stolen somebody’s car and might do it again.

Meaning: He has stolen a car and might steal another car.

Gratefully,
Navi.

yes.