When the costumed vigilante Sentinel of Liberty went insane in the 1990s and had to be killed, his secret stronghold in the Arctic Circle was discovered to contain twelve clones being grown. Each potentially possessed the same abilities as the Sentinel--that is, enhanced psychokinetic powers fueled by etheric energy siphned from external sources. Rather than kill the clones, they were given false identities, placed in foster hmes around the country and kept drugged to prevent their powers from manifesting.
In 2013, one such clone travelled to the Northpole, working as an engineer, unaware of his origins (SS04: Shades of War). Killed then possessed by the vengeful spirit of the Sentinel, unlocking the clone body's powers. The resurrected Sentinel returned to the United States and killed a second clone, harvesting the body for his use. This Clone, #5, had also grown up an adopted child, marrying and in turn starting his own family. A family that included his son, Jason.
On the night both his parents were killed, Jason Trumball faced off against the resurrected Sentinel, inadvertantly triggering his dormant abilities and weakening the Sentinel.
Jason was soon recruited by Detachment 1039 and assisted their investigation into Sentinel's return. Fifteen year old Jason assisted the Stone Soldiers in defeating the Sentinel and was taken into protective custody--spirited away to the Fox Island research facility.
Today, Jason serves as an assistant to Dr. William King while simultaneously learning how to safely absorb etheric energy and channel it into psychokinetic abilities ranging from enhanced strength, healing, pyrokinesis and clairvoyance.