new president Dick Cheney on his investigation surrounding evidence related to the assassination. James Urbaniak as Dr. James Pearn, an FBI forensic examiner assigned to the case to collect and catalogue evidence against any possible suspects. He obtains a partial fingerprint of Jamal Abu Zikri from traces of gunshot residue at the crime scene, but notes that it is only associative evidence and not necessarily enough evidence for a conviction in a court of law. Neko Parham as Casey Claybon, son of possible suspected assassin Al Claybon. A war veteran who did not particularly support Bush, but who also claimed to have no knowledge of the assassination. He was initially arrested in the melee following the killing, as he walked through the streets of downtown Chicago looking for employment. Seena Jon as Samir Masri, a Yemeni American protesting at the war rally outside where the President was speaking. Members of his family were deported back to Yemen after overstaying their travel visas following the 9/11 attacks. Masri was at the rally to protest Bush's policies and was arrested as a suspect. Christian Stolte as John Rucinski, FBI investigator with the joint terrorism task force, assigned with interviewing detainees including Jamal Abu Zikri. Skeptical, he stresses his suspicions about Zikri's whereabouts on the day of the assassination as well as his military history after analysing his statements. Chavez Ravine as Marianne Claybon, wife of suspected possible assassin Al Claybon. She finds it hard to comprehend her patriotic husband could have had any connection with the killing. Patricia Buckley as Dawn Norton, Jamal Abu Zikry's defence attorney. She immediately expresses her challenging task of defending her client who the FBI believes has connections with terrorist organisations. She relates her difficulty by conveying that any person suspected of involvement with Al-Qaeda unfortunately equates to a guilty verdict in American society. Malik Bader as Jamal Abu Zikri, the suspected assassin, a Syrian national working at an IT firm in a building neighbouring the Chicago Sheraton. He was convicted of the crime, but appealed the verdict while being held on death row due to minor forensic evidence implicating him in the assassination. Tony Dale as Al Claybon, the figure cited as a strong likely suspect of the assassination who ended up committing suicide after he supposedly killed the president. He was a Gulf War veteran distraught over a second son's death from the Iraq War,