Tā shì yī míng jiǎshìfàn, zhèngzài jiēshòu jiānkòng.
He is a parolee currently under supervision.
Tips
usage
假释 means parole - the early conditional release from prison. Adding 犯 (criminal/convict) forms 假释犯, a person on parole. Compare 缓刑 (suspended sentence), which does not involve serving prison time first.