The sheriff tells the FBI St. Jude is the patron saint of the police department. In the Catholic faith, St. Jude is known as the Patron Saint of lost causes and desperate cases. This is why St. Jude has become more popularly known for St. Jude's Children's Research Hospital.
Saint Jude is the patron Saint of Chicago Police. Saint Michael is the patron Saint of police. The sheriff was wrong
This episode aired in 2010, in 2009 according to Wikipedia the population of the town was only 58. Satellite photos show 20 to 30 scattered buildings and dirt roads over a 2 mile area. Unlike the multiple homes and paved roads depicted in the episode.