Robert Carl Hohenberger (1943 – May 31, 1978) was an American criminal, kidnapper and serial rapist, as well as the prime suspect in a series of murders committed against teenagers in Morgan City, Louisiana between March and May 1978.
His duties included patrolling the streets in his free time from his main job, as well as monitoring the protection of citizens' rights and public order.
In 1971, he was arrested in Laguna Beach for kidnapping two girls at gunpoint, for which he was found guilty and sentenced to life imprisonment, but with a right of parole after six months.
In the following months, the victim identified Hohenberger as the perpetrator after a series of mugshots of sex offenders were shown to her, and so, he was put on a national wanted list.
He stayed in the small town of Bayou Vista, where, using the pseudonym Frank Henry Green, he found work and housing at R&M Service Inc., a supplier for welding equipment.
On May 11, 15-year-old Judy Adams and 14-year-old Bertha Gould went missing after attending a fair near the Central Catholic High School in Morgan City.
After checking the vehicle's registration plate, the police identified the man as Frank Green, whose real identity was revealed following an examination of his fingerprints.
During the investigation, the police interrogated Hohenberger's neighbor, 38-year-old Sydney Harris, who, after the fact, contacted Robert and told him about the impending arrest, giving him an opportunity to flee.
On May 26, in the sewage system of Bayou Vista, not far from where Hohenberger worked, the bound bodies of two girls with signs of abuse and strangulation were found.
After that, the police, in order to find the bodies of other missing teenagers, conducted a search operation with the participation of several law enforcement agencies and volunteers who examined abandoned buildings, fields, forests and sewers.