Oba Chandler
Oba Chandler (October 11, 1946 – November 15, 2011) 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.
Prior to his arrest, Chandler worked as an unlicensed aluminum-siding contractor. Against the advice of his attorneys, he testified in his own defense, saying he had met the Ohio women and had given them directions. Chandler said he never saw them again, except in newspaper coverage and on the billboards set up by authorities. Police originally theorized that two men were involved in the murders, but this was discounted once Chandler was arrested. Following his conviction, Chandler was incarcerated at Union Correctional Institution. During his seventeen years of incarceration until his execution, he did not have a single visitor.
Chandler was executed on November 15, 2011. He wrote a last statement to prison officials: "You are killing a [sic] innocent man today". The statement was read at a post-execution news conference. In February 2014, DNA evidence identified Chandler as the murderer of Ivelisse Berrios-Beguerisse, who was found dead in Coral Springs, Florida, on November 27, 1990.
Source: Wikipedia