>> reporter: one of the men began communicating with an isis administrator in iraq who encouraged him to join the terrorist group overseas according to court documents. investigators say later communications revealed the two men began coordinating travel to turkey. often seen as a gateway into syria by foreign fighters. >> to prove a conspiracy, you only have to show that there's been a material effort or forward step in furtherance of the conspiracy. and clearly those communications would indicate that there's been a forward step in the conspiracy. >> reporter: in court documents released both suspects are accused of purchasing roundtrip tickets to turkey with the help of their friend who allegedly provide more than $1,000 for their travel. one of the men told a confidential informant if he was detect at the airplane they could kill a police officer and use the -- at the airport, they could kill a police officer and used officer's gun to shoot