The Unresolved Mystery of Jill Rosenthal

Jill Lynn Rosenthal disappeared from Atlantic City, New Jersey, in 1965. She was only 21 months old.

Jill had a twin brother named Jack Thomas Rosenthal. In July 1965, Jack was found abandoned in Newark, New Jersey. Jill was not with him.

Neither child had been reported missing. As a result, authorities did not know that Jack had a missing twin sister. Jill’s disappearance remained unknown for decades.

Today, the New Jersey State Police continues to seek information about Jill. Her case remains unresolved.

Jill Rosenthal: Details of the Disappearance

Jill’s Last Known Sighting

Information provided by The Fronczak Files places Jill’s last known sighting around May 1965.

A teenager named Susan Wohlert reportedly babysat the twins during that period. The research team later contacted her and spoke with her several times.

She reportedly never saw Jack or Jill again after that time.

The National Center for Missing & Exploited Children officially lists Jill as missing from Atlantic City around July 2, 1965. No confirmed information explains what happened to her after her final known sighting.

Jack Was Found Alone

In July 1965, someone found a young boy abandoned in a stroller outside a department store in Newark, New Jersey.

The child was Jill’s twin brother, Jack.

The Fronczak Files identifies the location as McCrory’s Variety Store on Broad Street. Jill was not found outside the store and was not with her brother.

Official NCMEC records list July 2, 1965, as the date Jack was found. Research conducted by The Fronczak Files places his abandonment on July 6, 1965. The official record has not yet been changed to reflect that date.

No Search Began for Jill in 1965

According to information provided by The Fronczak Files, the twins’ biological parents did not report either child missing.

Authorities therefore had no missing-person report connecting Jack to the Rosenthal family. They also had no report showing that his twin sister had disappeared.

The community did not organize a search for Jill. Detectives did not begin searching for her in 1965 because her disappearance was not known.

NCMEC reports that nobody realized Jill was missing until her twin brother uncovered his identity decades later.

Jack Was Mistaken for Another Missing Child

When Jack was found in Newark, nobody knew his name or where he came from.

Authorities believed he might be Paul Fronczak, an infant who had been abducted from a Chicago hospital in 1964. DNA testing was not available at the time.

Jack was placed with the Fronczak family and raised as Paul Fronczak. He spent much of his life believing that they were his biological family.

DNA testing later showed that he was not biologically related to them. Genetic genealogy eventually identified him as Jack Thomas Rosenthal.

The discovery revealed that he had a twin sister named Jill whose whereabouts were unknown.

Modern Efforts to Solve the Case

Official Age-Progression Image

There are no known childhood photographs of Jill.

The National Center for Missing & Exploited Children created an official age-progression composite showing how Jill might have appeared at approximately 58 years old.

Forensic artists developed the image using photographs of Jill’s biological relatives. The composite is an estimate and does not show her confirmed appearance.

The official NCMEC age-progression image should be used when sharing Jill’s case.

The Current Investigation

The New Jersey State Police handles Jill’s missing-person case.

NCMEC identifies the New Jersey State Police as the investigating agency. Jill’s official NCMEC case number is 1419009. Her NCIC number is M436208441.

Investigators continue seeking information that could explain what happened to Jill after 1965.

Community’s Role in Finding Jill

The public can help by sharing Jill’s story accurately.

Important details include:

• Jill had a twin brother named Jack.
• Jack was found abandoned in Newark.
• Jill was not found with her brother.
• Jill disappeared from Atlantic City.
• Neither twin was reported missing at the time.
• No organized search for Jill began in 1965.
• The New Jersey State Police handles her case.
• The official NCMEC image should accompany her story.

Accurate information may help someone recognize Jill, remember the Rosenthal family, or recall events from 1965.

Questions That Remain

Decades later, Jill’s disappearance still leaves many questions.

What happened to her after her last known sighting?

Why was Jack abandoned without his twin sister?

Was Jill taken somewhere else?

Could she have survived under another identity?

No confirmed evidence currently answers these questions.

Jack continues searching for information about his twin sister. He hopes someone may remember a detail that could finally explain what happened to her.

How You Can Help

Contact the Authorities

Anyone with information about Jill Rosenthal should contact the New Jersey State Police at:

1-609-882-2000

Information may also be submitted to the National Center for Missing & Exploited Children at:

1-800-THE-LOST
1-800-843-5678

Please reference NCMEC case number 1419009 when providing information.

Spread Jill’s Story

Sharing Jill’s story may bring it to someone with important information.

Use the official NCMEC age-progression image. Include the correct locations, family relationship, and investigating agency.

Even a small memory could provide investigators with a new lead.

Conclusion: The Search Continues

Jill Lynn Rosenthal has remained missing since 1965.

Her twin brother spent decades living under another identity. DNA testing and genetic genealogy eventually revealed that he was Jack Thomas Rosenthal.

That discovery also brought Jill’s disappearance to public attention.

Many questions remain unanswered. However, accurate reporting, DNA technology, and public awareness may still help uncover the truth.

Jill deserves to be found. Her brother deserves to know what happened to his twin sister.

Sources

• National Center for Missing & Exploited Children
• New Jersey State Police
• Information provided by The Fronczak Files