Why has the FBI failed to investigate J6 gallows builders?

Defense attorney Ed Martin joins John Solomon and Amanda Head on Just The News No Noise with new footage from the morning of January 6th, 2021 saying four men were caught on cameria setting a hangman's gallows near the DC mall as early as 6:30 am local time. Martin continued questioning why the FBI has failed to investigate the perpetrators adding he suspects "bad motives"