Iftikhar confessed to threatening to kill and racially harassing Walsh during the flight but denied any harassment charges related to his confrontation with Merchant.
The charges include narco-terrorism, conspiracy to import cocaine, illegal possession of machine guns and explosive devices, and conspiracy to possess such weapons.
Jeannine Semanchik, the victim's mother, said her daughter tried to alert authorities about her unstable ex-boyfriend, but no action was taken to ensure her safety.
By leaving the state, the Democrats effectively broke quorum in the Texas legislature, stopping Republicans from moving forward with legislative proceedings.