The reason for Jamisons departure in Chernarus was due to him coming down to see a long lost relative of his which was his brother, Morgan Harrlow. Ever since Jamisons arrival he has yet to ever find Morgan, or to come into any contact with Morgan at all. Although, Jamison is confidant that Morgan is alive and is out there in Chernarus somewhere. Jamison, because of his long lost brother, now wanders the streets and woods of Chernarus hoping to find his lost brother. Jamison hopes to find Morgan either alive, or dead. Jamison hopes that once he closes off that chapter in his life, and concludes the shenanigans with his brother that he can make his way back to the states, and back to his wife, and two daughters.
Jamison eventually wandered to a place called "Camp Hope" where he learned how to be a nurse, then soon to be doctor of camp hope officially. Jamison had stayed around in hopes of finding, or hearing about his long lost brother Morgan. Eventually he had heard that his brother was with the organization called "Potius Cras".
Jamison had eventually met up with folks who were in Potius Cras up in Berezino. They had told Jamison some things that Morgan wishes upon his own brother. Jamison is led to believe that his brother no longer cares about him and wishes him his own death.
Jamison now suffers from Schizophrenia due to the meeting of Emma Isaksen. And suffers from Multi-personality disorder due to his own mental state degrading slowly. This now forever has changed his life and those around him.