Final answer:
Juan Corona, a California serial killer, was sentenced to life in prison in 1973 for killing 25 migrant workers.
Step-by-step explanation:
The serial killer in question is Juan Corona. In 1973, Juan Corona was sentenced to life in prison for killing 25 migrant workers in California. His crimes took place in 1971 when he committed a series of brutal murders targeting migrant farm workers. Corona was found guilty and received a life sentence without the possibility of parole.