Mochizuki-sanchi no Yankee - Vol. 3 Ch. 16

[MangaDex]

 

[NicholasTurner]

While jobs like security or police do kind of require you to profile people what you should be profiling is their actions not their physical appearance. He fell into the classic (and annoying) problem of letting his bias slip into his profiling, he was so focused on the person who looked like a delinquent he completely missed the criminal blatantly stealing that was next to him.