When_____(catch)money from the man,the thief was sent to the police求大神帮助

问题描述:

When_____(catch)money from the man,the thief was sent to the police求大神帮助
填什么?为什么?

having caught when后接分词短语,因为小偷偷钱导致小偷被投入*,有前后关系,所以用完成时态.