During a speech to law enforcement on July 28, President Trump said "please don't be too nice" to suspects who are arrested. (Video: The Washington Post)

During a speech on Long Island on Friday, President Trump took a break from discussing gang violence and illegal immigration to give the law enforcement officers gathered for his remarks some advice on how to treat suspects.

“When you guys put somebody in the car and you’re protecting their head, you know, the way you put their hand over?” Trump said, miming the physical motion of an officer shielding a suspect’s head to keep it from bumping against the squad car.