A week passes by without any sign of missing baby Janna Rivera

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INDIANAPOLIS, Ind. (June 5, 2015) - Friday marks one week since a three-month-old girl was reported missing on the east side of Indianapolis. Janna Rivera's mother called 911 and said the baby was dead, since then police have been searching for the baby's body.

Police are growing concerned about finding a body but continue to work on building a case.

"It may take a little bit longer particularly in a case like this when you have no physical evidence," said Sgt. Kendale Adams with IMPD.

On Thursday police received a tip that the baby's remains were possibly in a field near E. 56th and Carroll Rd. Investigators searched the field with cadaver dogs but the search did not turn up anything.

Police have searched multiple locations since the child was reported missing. They started by searching the home where the baby lived with her mother and father, Jeffrey Fairbanks. Investigators are working to sort through conflicting stories. They don't know if the baby was placed in a dumpster or buried.

Fairbanks remains the only person of interest in the case. Detectives questioned him extensively on Friday but he was ultimately released. Police are continuing to talk with the prosecutor's office during the course of the investigation.

"The hardest part for us is we believe that there's someone out there someone that is close to this family, someone that's close to this mother and father that may know something and that is the piece that we're missing," said Sgt. Adams.

Investigators will continue to follow up on any leads or tips generated in this case.