BAKERSFIELD, Calif. (AP) — Authorities say they are investigating whether the death of a couple's baby in California is related to the death of their older child in Kansas in 2015.

Gage and Debra Roberts were charged with second-degree murder Tuesday in the death of their infant in a Bakersfield hotel in April 2016, the Bakersfield Californian reports (http://bit.ly/2uBoeam).

In Kansas, Shawnee County's District Attorney Michael Kagay then announced Wednesday there was an ongoing investigation into the death of the couple's six-month-old baby in Topeka in 2015.

Kagay said his office is coopera...