Nothing is known about Roman's life prior to or as the outbreak began.
At some point during the outbreak, Roman joined a community in Ohio.
When Eugene heads to the Racine apartment building to search for Shira, Calhoun exits through the front door, allowing Eugene inside. That night, Eugene is drunk and relieving himself up against a tractor in the Warehouse District when Calhoun walks by, promoting Eugene to stop and ask him questions. Calhoun remains patient and answers the drunken Eugene's questions and walks away before he can ask anymore. Since then, Calhoun has been secretly spied on by Eugene, with his daily schedule and routines carefully studied without his knowledge. One day, Calhoun went out on his usual 10 mile jog leaving his apartment empty and available for Eugene and Juanita to break into. They find a suitcase under his bed filled with weapons and are able to escape undetected when Calhoun cuts his run short due to rain and returns to his home. However, after an elderly neighbor alerts the Commonwealth Army of intruders in the building, Eugene and Juanita are arrested. Following his boss' orders, Calhoun does not press charges against the pair. On another night, Calhoun is gathered with his boss and fellow operatives when Eugene infiltrates their hideout but is captured. He and the other operatives proceed upstairs while Lance Hornsby speaks with Eugene.
This list shows the victims Roman has killed:
- Possibly numerous counts of zombies