My son is 38 years old, lived with me, made roughly $2,000 last year, can he be claimed as a dependent? Can I still claim him if he filed his own taxes? or do I file him?

My son is 38 years old, lived with me, made roughly $2,000 last year, can he be claimed as a dependent? Can I still claim him if he filed his own taxes? or do I file for him? Since we supported a lot for him we should be able to claim him, right?