Colorado deputy with MS to run one of country’s biggest marathons to fundraise for a cure

Multiple sclerosis, or MS, is a disease that causes the immune system to attack the protective sheath that covers nerve fibers. Symptoms and severity of the disease vary from person to person. In some cases, patients lose the ability to walk.
There’s no cure for MS, but one Colorado man living with the disease hopes his perseverance will help raise money for MS research.
By day, you’ll find John Carrasco running. But at night, you’ll find him working the graveyard shift at the Douglas County Jail.

CBS