San Francisco

A proposal to regulate two popular Castro District hangouts by restricting chairs and shopping carts is a step closer to becoming city law. The Board of Supervisors will decide Tuesday on an ordinance, which passed the Land Use Committee this week, that would ban nighttime sitting, sleeping, vending, smoking and even pushing a shopping cart in Harvey Milk and Jane Warner Plazas.

A medley of people wait for the San Francisco Public Library to open in the morning. Students on a deadline. People who really need a library book. Retired folks. And people checking email. As the doors open, patrons stream into the atrium at the main branch near the Civic Center in downtown San Francisco. Some head to their favorite reading nook; others to computers to start surfing the Web.

The arrest last week of a suspect in a violent San Francisco kidnapping capped a monthlong investigation headed by human trafficking and domestic violence officers from the Police Department’s revamped special victims unit. The case, police officials said, is one of the first fruits of a new collaborative approach emphasizing long-term investigations by officers across disciplines. The pursuit involved human trafficking investigators, who as recently as last summer were instead focusing much of their energy on arresting prostitutes on the street, leading some critics to say their efforts were counterproductive because they punished abuse victims.

Gabriel Thompson worked alongside immigrants in the back of restaurants in New York City and in factories that produced some of the most basic foods in the American diet: lettuce and chicken. Not an immigrant himself, Thompson used his investigative reporting techniques to lift a veil on working conditions that many undocumented immigrants and low-income Americans face daily. His colleagues experienced excruciating soreness from physical labor. They had no employee benefits. And they had to do monotonous and repetitive work, which led to a high rate of injuries. Thompson’s one-year immersion into the lives of working immigrants, documented in his recent book, “Working in the Shadows,” comes at a time when working conditions are changing. The immigrant workers are leaving the workplace under pressure from law enforcement, a trend that is forcing the employers to look for new ways of attracting workers.