https://cdnph.upi.com/ph/st/th/1521785082353/2026/upi/ed3aff6a9991ce707a2814c647610ead/v1.5/Border-czar-Tom-Homan-ICE-agent-vetting-process-under-review.jpg" /> Border czar Homan said ICE's vetting was under review amid allegations the agent involved in a shooting in Maine may have had a criminal background.