Guilt
Put a net around a criminal to show their guilt. Criminals look like anyone else on the street, so you decide to tie them in nets to make sure people know who they're dealing with.
Imagine throwing a net around someone you think, no, you know is guilty of doing something bad to you. It feels pretty nice.
ざい
つみ
None
The guilt shows on the criminal's face. They smile, shrug, and pull a stolen xylophone (ざい) out of their back pocket.
Woah! The xylophone is huge, how did they... well whatever, you definitely have proof that they're guilty now and the cops should be here any minute to take your criminal catch.