Alarm bells were raised Friday when Marron’s brand-new OC1 kayak was found washed up and broken in two close to a jetty, close to the entrance channel of Mission Bay, according to his wife.

Daniel Marron, a professor of psychology, from Yuma, Arizona, set off on Valentine's Day for a “typical paddle” on an outrigger kayak but failed to return home, his family has said. Alarm bells were ...