From his lawyers motion to suppress:

The government was investigating Mr. Tunick because of his association with an environmental movement known as Defend the Atlanta Forest, which opposed the destruction of the South River Forest for the construction of an 85-acre, $115 million police training facility known as the Atlanta Public Safety Training Center.

So like right there next to the bomb in Luigi’s backpack, they made up a justification to violate his rights because this is a fascist police state.