What law is Donald Trump breaking? Where is it in statute?

The law you quote is under the authority of the Constitution, which guarantees due process, freedom from unreasonable searches and seizures, etc.

Due process includes having your accusers in criminal matters prove their charges in court, facing your accusers, etc. Search warrants have to be specific, not vague, and arrest warrants have limits.

The fact that US citizens' rights have been violated should give people pause.