Robert Wayne Harris, who was convicted of killing five people at a car wash in Irving, was executed by Texas after the U.S. Supreme Court declined to stay his execution.
Marvin Wilson, an inmate with an IQ of 61 and the reasoning skills of a grade school student, was the latest to die in the Huntsville death chamber.
The U.S. Supreme Court, which had stayed Cleve Foster's execution three times in the last year, declined to intervene Tuesday.
Mario Swain, convicted of the murder of a Longview woman, had a history of stalking and assault.
Yokamon Hearn was also the first person in Texas to be executed with the new single-ingredient lethal formula, pentobarbital.
Jesse Joe Hernandez, who was pronounced dead on Wednesday night at 6:18 p.m., had beaten a 10-month-old baby to death in 2001.
Texas is set to execute George Rivas, who killed an Irving police officer on Christmas Eve 2000 after a legendary jail bust.
The Columbia University Human Rights Law Review published a 400-page investigative article that alleges that in 1989, Texas executed the wrong man for a 1983 murder.
Beunka Adams, who was pronounced dead on Thursday night at 6:25 p.m., participated in a deadly convenience store robbery in 2002.