san antonio police officers issued a fine to local chef and activist joan cheever for feeding the homeless at maverick park april 7 .
cheever founded the chow train non-profit food truck in 2005 to feed the city 's poor .
has a commercially licensed mobile food truck where she prepares her meals , but she serves them out of her personal pickup truck .
cheever accused city officials of violating her freedom of religion because she considers cooking and feeding the poor a free exercise of her faith .