A double killer who murdered a father and his baby before trying to kill a judge during his trial has been executed.
James Bigby, 61, was put to death by lethal injection for shooting dead the dad and drowning his child in a sink in 1987.
The paranoid schizophrenic became the fourth death row inmate to die in Texas, US, this year when he was killed last night.
Officials said Bigby struggled to stop crying before he was taken into the death chamber, as he expressed sorrow for his crimes.
While strapped to a gurney with an intravenous drip attached to his arm, he turned to his victim’s family to ask for their forgiveness.
“I hope this will bring you peace and I’m sorry for all the pain and suffering,” he told them as his voice faltered.
“I hope that you could forgive me, but if you don’t, I understand. I don’t think I could forgive anyone who would have killed my children.”
As the drugs began to take effect, he prayed saying “I promise, I’m sorry,” several times.
He then began singing, “Jesus Loves Me” ,before taking a few breaths, snoring and stopping all movement.
Fourteen minutes after receiving the lethal injection, Bigby was pronounced dead at 6.31pm.
The former car mechanic was given the death penalty for the fatal shooting of Michael Trekell, 26, and the death of Mr Trekell’s four-month-old son, Jayson, at their home in Arlington on Christmas Eve.
He was also was accused, although never tried, of killing two other men, believing they along with Mr Trekell had plotted against him in a dispute at his former employers.
During his trial, Bigby grabbed a loaded gun from behind District Judge Don Leonard’s bench during a court recess and barged into the justice’s chambers.
The judge and a prosecutor wrestled Bigby to the floor before managing to pull the gun away.
Jurors were told about the attack before rejecting Bigby’s insanity defence.
They decided he should be executed before a federal appeal court ruled in 2005 the trial jury wasn’t properly instructed and quashed the punishment.
During a retrial three years later the death penalty was reinstated.
After the execution, Mr Trekell’s sister, Deborah Trekell-Jameson, released a statement saying she witnessed the death not to judge him, but to “support the completion of what James Bigby began with my family almost 30 years ago … when he committed such a heinous crime.”