An inmate was executed Wednesday for the drug-related slayings of a south Texas couple in 1995. Officials cut his final statement short after he tried to argue with the victims' relatives.

Jesus Ledesma Aguilar, 42, made eye contact with them and asked whether they were happy he was being executed.

"I didn't kill your father," he said to someone he mistakenly thought was the son who witnessed the crime.

Aguilar and his nephew, Christopher Quiroz, were convicted in separate trials of the execution-style shootings of Leonardo Chavez Sr., 33, and his wife, Annette, 31. Quiroz got life in prison.

Aguilar's last remarks were mistakenly addressed to a stepbrother of Annette Chavez, instead of Leonardo Chavez Jr., who was 9 when he witnessed the killings from beneath a table. He was not present.

The stepbrother told Aguilar, "I'm not Leo." Other family members told him not to respond to Aguilar.

The Supreme Court refused to block the execution after Aguilar's attorneys argued he had not been allowed to challenge information from an alleged accomplice.

Aguilar had threatened to kill Annette Chavez's brother - his marijuana-smuggling partner - if he didn't stop moving drugs for another supplier, according to court records. Aguilar denied, however, killing the couple as part of the dispute.