He asked me to come to the station and look through mug shots. (Para. 30)
A mug shot is a photograph of someone, especially a photograph of a criminal which has been taken by the police.
look through: to look quickly in; examine or study carefully
I'll look through my notes but I don't think I have a record of his name. 我会仔细看一下我的笔记，可我觉得我没有记下他的名字。
Look through your examination paper for any small mistakes before you hand it in. 交卷前，好好检查一下你的试卷，看看有没有小错。