Trump administration investigators nabbed DC pipe bomb suspect Brian Cole based on no public tips — just old-fashioned police work, FBI Director Kash Patel exclusively told The Post on Thursday. Despite offering a $500,000 reward for information leading to the arrest of the person who laid pipe bombs at political offices in Washington, DC, the Biden administration was unable to catch a suspect during the former president’s only term in office. But Trump’s FBI was able to crack the nearly five-