Clinton's advisers questioned in private email probe

Some of Democratic presidential candidate Hillary Clinton's closest aides, including her longtime adviser Huma Abedin, have provided interviews to federal investigators as part of the probe into the security of Clinton’s private email server, U.S. officials briefed on the investigation told CNN on Thursday.

The investigation is still ongoing, but so far investigators haven't found evidence to prove that Clinton willfully violated the law, the officials told the network.