President Donald Trump is proudly celebrating former FBI Director Robert Mueller's death at 81. "Robert Mueller just died. Good, I'm glad he's dead," the commander-in-chief, 79, wrote via his social media platform Truth Social on Saturday, March 21. "He can no longer hurt innocent people!" Trump then signed the post, "President DONALD J. TRUMP." Mueller, a former federal prosecutor who led the probe into the 2016 Trump campaign's alleged ties to Russia, died on Friday, March 20, according to a statement released by his family on Saturday.