When a Russian-born American citizen named Ilya Beloozerov is gunned down by the FBI in 2024, the authorities refuse to say why they’d killed him. CNN’s Isabelle Chapman embarks on a sprawling investigation that takes her from the Mississippi parking lot where he died to Washington, D.C. to unravel the mystery: Why did Ilya abruptly leave his family and his job and head for the border with laptops and cash? Why is there still no official explanation of his death? And maybe most importantly: Was Ilya a spy?