The Brief Volunteer crews launched a renewed search effort Sunday morning for Amy Hillyard, an Oakland mother and coffee shop co-owner who vanished more than four months ago. Organizers said the renewed search follows a recent review of surveillance video, which captured Hillyard leaving her Oakland home on the day she disappeared. Volunteer crews launched a renewed search effort Sunday morning for Amy Hillyard, an Oakland mother and coffee shop co-owner who vanished more than four months ago. Amy Hillyard has been missing from Oakland since March 25. Search crews are getting assistance from the East Bay Regional Park District as they canvas the Redwood Regional Park area.