(CNN) A CNN review of absentee ballot envelopes has found irregularities with witness signatures in a second North Carolina county.

Dozens of absentee ballots were witnessed by four people in Robeson County, which is adjacent to Bladen County -- the place investigations by the state elections board and state and local prosecutors had been focused.

The people who witnessed multiple ballots are loosely connected to Leslie McCrae Dowless, the political operative who is being investigated for alleged election fraud.

North Carolina law requires two witnesses to sign the envelopes of the absentee ballots. Usually, those witnesses are family members or friends. Investigators in North Carolina are looking into allegations that Dowless' group picked up unsealed ballots and either witnessed them and turned them in or threw them away.

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