https://motherboard.vice.com/en_us/article/ywb5py/twitter-re-activated-an-account-it-told-congress-was-connected-to-a-russian-troll-farm

We can say for certain now that at least one real person was accidentally swept up in Twitter's investigation into how Russia used its platform to influence US politics.

Twitter mistakenly identified an account belonging to an American named Robert Delaware as linked to a Russian troll farm. In October, it suspended Delaware's account and sent record of it to Congress as evidence of Russian interference. After Motherboard ran a story last week highlighting the mistake, Twitter reactivated the account.