This photo provided by the University of Colorado shows James Holmes. University spokeswoman Jacque Montgomery says 24-year-old Holmes, who police say is the suspect in a mass shooting at a Colorado movie theater, was studying neuroscience in a Ph.D. program at the University of Colorado-Denver graduate school. Holmes is suspected of shooting into a crowd at a movie theater killing at least 12 people and injuring dozens more, authorities said. (AP Photo/University of Colorado)

SAN DIEGO| A man who lives next door to the California family of a man suspected of shooting dozens of people at a Colorado movie theater says he was a loner.

This photo provided by the University of Colorado shows James Holmes. University spokeswoman Jacque Montgomery says 24-year-old Holmes, who police say is the suspect in a mass shooting at a Colorado movie theater, was studying neuroscience in a Ph.D. program at the University of Colorado-Denver graduate school. Holmes is suspected of shooting into a crowd at a movie theater killing at least 12 people and injuring dozens more, authorities said. (AP Photo/University of Colorado)

Tom Mai is a retired electrical engineer who is neighbors with the family of 24-year-old James Holmes on a quiet, well-to-do San Diego street of two story homes with red tile roofs.

Mai says he said hello to Holmes once in a while but seemed to be shy.

Mai says the family lived there about 10 years. The mother is a nurse and the father is a manager at a software company. The suspect has a younger sister.

Mai says the mother told him Holmes couldn’t find a job after earning a master’s degree from a public university in California.