San Antonio Fire Department Arson Investigator Justin Davis directs Kai, the department's accelerant detection canine, during a training session on Wednesday, July 23, 2014, at the SAFD Fire Training Academy in San Antonio. Kai, a 6-year-old female labrador retriever, began working with Davis in July 2010 and is trained to detect flammable liquids such as gasoline or charcoal lighter fluid.