The police lined up the suspects so I can recognize the one who stole my bag. In police investigations, a lineup is a process where potential suspects are presented to a witness to see if they can identify the perpetrator of a crime. By having the suspects in a lineup, the witness, in this case, you, can try to recognize and point out the individual who committed the theft. This procedure is essential for gathering evidence and potentially leading to the arrest and conviction of the right person.