He was the husband of Hannah McKay, a serial killer.
During Jake and Hannah's marriage, she became pregnant. Although Hannah wanted a family, Jake demanded that she get an abortion or he would leave her. In response, Hannah killed him by poisoning him with Aconite. She later suffered a miscarriage.
Ten years after Jake's death, Lieutenant Debra Morgan looked into whether he was poisoned. She had Jake's body exhumed through his sister, Lori, to run tests on it. However, since Hannah did not have the body embalmed, there was no tissue to test.