Youssef, an Egyptian-born Christian who's now a U.S. citizen, sought to obtain a passport in his new name but still had a California driver's license as Nakoula, authorities said. Youssef used a third name, Sam Bacile, in association with the film.
Authorities said Youssef used more than a dozen aliases and opened about 60 bank accounts and had more than 600 credit and debit cards to conduct a check fraud scheme.
When he was identified as Nakoula after the movie trailer went viral, federal probation officials questioned him. He denied using the name Sam Bacile, which was listed on the YouTube account that posted the trailer, and said his role in the film was limited to writing the script.
Tess Lopez, a former federal probation officer who now is a sentencing consultant in Northern California, said if federal prosecutors can prove Youssef violated his probation, it's likely he would receive more prison time because the new allegations are similar to the original crime.
"Given the nature of the conviction, it would normally warrant a prison sentence," Lopez said.