Norton Shores police have upgraded attempted abduction suspect Jeffrey Willis to a "person of interest" in the Jessica Heeringa disappearance case, WZZM-13 reports.

Officials on the city, county, state, and federal level have been interviewing people close to Willis to find out if there are any possible connections between Willis and Heeringa according to a news release sent out on Monday, May 23.

Police are stressing, however, that work continues to possibly establish a firm link.

"... we will update the media and families of the victim when we have enough evidence to believe Willis is responsible for the disappearance of Jessica Heeringa," the release states.

More From Mix 95.7