Reporting a business? Dept of Labor?

Hi all

A friend of mine is working at a popular restaurant here in Mkdtiwn under insane work conditions and currently receiving NO pay from the restaurant. Like literally none. They never got a W2 or received a single paycheck. They also garnish their tips on arbitrary mistakes and customer complaints. Demanding $30 for a uniform t shirt but not providing any free ones to start with but also requiring employees to purchase and wear these insanely priced shirts.

There’s a plethora of other unethical things I could go into listing that this restaurant is doing wrong to their employees as well.

Is the Department of Labor who we would report to? How does that work? Is it going to make a difference? Would the restaurant close? We want the owners to face justice but we don’t want all their coworkers out of jobs because it closing.