The man caught stealing in the shop was sent to thr police stationThe man _ ________ in the shop was sent to thr police station为何用caught stealing ,还原是怎样的

The man caught stealing in the shop was sent to thr police station
The man _ ________ in the shop was sent to thr police station
为何用caught stealing ,还原是怎样的

（who was ）caught stealing 被抓住时在偷东西
有 who was 是定语从句.去掉 who was 是过去分词作定语.