Former Tesla employees remain troubled, confused by firings

Workers at a stamping machine in Tesla's electric car factory in Fremont, Calif. (Russ Mitchell/Los Angeles Times/TNS)

Frank Morales joined Tesla about four years ago, eager to work for a growing company. 

Morales handled the aggressive deadlines of the Tesla warehouse – until last month. He said he received years of strong performance reviews, but was fired one day "with no warning."