After his neighbor identified handwriting samples placed on local billboards by police, Oba Chandler was arrested three years after he committed a triple murder in the Tampa Bay area in Florida.

Oba Chandler was an American serial killer and mass murderer who was convicted and executed for the June 1989 murders of Joan Rogers and her two daughters, whose bodies were found floating in Tampa Bay, Florida, with their hands and feet bound. Autopsies showed the victims had been thrown into the water while still alive, with ropes tied to a concrete block around their necks. The case became high-profile in 1992 when local police posted billboards bearing enlarged images of the suspect's handwriting recovered from a pamphlet in the victims' car. Chandler was identified as the killer when his neighbor recognized the handwriting.

The Tampa Bay area is a major metropolitan area surrounding Tampa Bay on the Gulf Coast of Florida in the United States. It includes the main cities of Tampa, St. Petersburg, and Clearwater. It is the 17th-largest metropolitan area in the United States, with a population of 3,175,275 as of the 2020 U.S. census.