Florence "Sally" Horner was born on April 18, 1937 in Camden, New Jersey to Russell and Ella Horner. Sally's father took his own life when Sally was only 5 years old, and Ella raised her daughter as a single mother with the help of Sally's older half sister, Susan.
Sally was in the 5th grade at Northeast Elementary School and was an honours student.
In March 1948, Sally, who was 10 years old at the time tried to steal a notebook from a local store as a dare by some of her classmates. However, Sally was caught by a man named Frank La Salle. Frank had told Sally he was an FBI agent, and threatened to send her to a reform school unless she reported to him.
On June 15, 1948, Frank La Salle abducted 11 year old Sally. He told her to tell Ella that he was the father of two of her friends at school and she was invited on a week long vacation to Atlantic City.
Originally, the plan was to have Sally write her mother letters to let her know their vacation was going to last longer than expected, but on July 31, 1948, the last letter was received by Ella. Ella contacted the police, who found out the sender address for the letters was in Atlantic City.
On August 4, 1948, investigators found the home empty, besides two packed suitcases and a studio photo of Sally sitting on a swing. Ella told investigators that Sally and Frank were also travelling with a "Mrs. Robinson" who according to Frank was a 25 year old secretary. She left them after they arrived in Atlantic City supposedly.
Over the next 21 months, Frank and Sally moved through multiple US states under different names, with Frank claiming Sally was his daughter. Throughout this time, Frank would rape Sally repeatedly.
The pair first stayed in Baltimore, Maryland, where Sally went to Catholic grammar school under the name "Madeleine La Plante." Frank would always carry a handgun on him to stop Sally from trying to escape.
In April 1949, Frank and Sally were living in Dallas, Texas, and Sally was going by the name "Florence Planette." It was here that Sally ended up telling a friend her secret. Sally also confided in a neighbour, Ruth Janisch, who was becoming suspicious of Frank.
Ruth thought Frank had an extremely possessive attitude toward his supposed daughter. Ruth did not know that Frank also regularly molested her 5 year old daughter while Sally was at school.
In March 1950, Ruth and her husband moved to San Jose, California, to find work, encouraging Frank. to do the same so she could still have contact with Sally.
Eventually, Ruth was able to get Sally to tell her the truth about Frank, and Ruth got Sally to phone her family from Ruth's house. Sally attempted to call Ella but the line disconnected, as Ella had recently lost her job and was not able to pay her phone bill. Sally then called her sister Susan and was able to get in contact and tell her to get the FBI on it.
On March 22, 1950, Frank was arrested but continued to say Sally was his daughter. Authorities in New Jersey were able to confirm that Sally's real father had died 7 years previously. On April 1, 1950, Sally was reunited with her mother. Frank was sentenced to 30-35 years in Trenton State Prison on April 3.
Frank La Salle was 51 years old. at the time he abducted Sally. He was a known sex offender and went by several aliases. It is unclear where exactly he was born or even his date of birth. Most commonly the names used for his parents were Frank and Nora, and he was most likely from Chicago or Indianapolis. The most frequent date of birth he gave was May 27, between 1890-1901.
He had an extensive criminal record, beginning in June 1938. In 1944, Frank was convicted for the molestation and sexual assault of 5 underage girls in 1943. He was getting illegally married under false names and had many charges against him. He was released on January 15, 1948, only 6 months before he abducted Sally Horner.
Sally's story ends tragically, as on August 18, 1952, she died in a car accident near Woodbine, New Jersey due to breaking her neck in the crash. She was only 15 years old. Frank had actually sent a bouquet of flowers to Sally's funeral from prison, but they were not displayed.
Frank La Salle died on March 22, 1966, exactly 16 years to the date of when he was arrested for the abduction of Sally Horner. He was 69 years old.