Beverly Mitchell put in extended times aiding canine and cats as a volunteer at the Los Angeles town animal shelter in Lincoln Heights. Dependable by employees, Mitchell was even supplied keys to professional medical rooms that have been off-limits to other volunteers so she could examine on the animals. But Mitchell’s 3-12 months services with the city finished when she was fired in 2016. Right now, she and the previous head of the Animal Services section disagree on the explanations for her dismissal. The town relies on an army of unpaid volunteers to care for animals — feeding and going for walks them, dealing with adoptions and other jobs. But…