Homeless Californians are often victims of violence and struggle with mental health and substance abuse issues before losing their homes, according to new research from the University of California San Francisco. The study released Tuesday spoke with a representative sample of 3,200 homeless people in California, the largest number for a study since the 1990s, authors said. California is estimated to have over 170,000 homeless people, about one-third of all in the country. Nearly two-thirds of California’s homeless struggle with severe mental health issues, the study found. More than a quarter had been hospitalized as a result. Another two-thirds also...