A Durham man was charged by federal authorities with supporting ISIS and later attempting to join the group, according to court documents that were unsealed on Tuesday.

Investigators learned that his flight was set for Dec. 4 from RDU with a return flight to the Triangle on Dec. 18. An FBI special agent noted that White likely purchased a round-trip ticket to avoid arousing suspicion, a common practice among Islamic extremists.

The FBI has charged a Durham man with attempting to join ISIS, a recently-unsealed court document shows. Alexander Justin White, 29, also known as Sulaiman Al-Amriki, is charged with providing, attempting and conspiring to provide material support to a designated foreign terrorist organization,