Norton Shores Police Chief Dan Shaw told WOODTV8, that Secret Service Agents are working alongside detectives with the Ottawa County Sheriff's department to help find a lead in the case of missing woman, Jessica Heeringa.

TV8 reports the investigators plan to be in the Norton Shores area for as long as it takes to find answers.

Chief Shaw also told TV8 that police were able to interview 14 people of interest yesterday and will keep their identities private, for now.