Christopher Rubio woke up one day in May 2016 and realized his ex-girlfriend and their kids were gone. So he grabbed a shotgun.

Rubio, 22, went to her mother's home and pushed past several family members to find Elizabeth Adams, who was hiding in the bathroom with her new boyfriend, James Tews.

He fired five times at the couple, killing the 20-year-old Tews and 19-year-old Adams.

Christopher Rubio (Dallas County Jail )

A Dallas County jury needed only a few minutes Wednesday to convict Rubio of capital murder. He put up no defense and received an automatic sentence of life in prison without the possibility of parole in a trial that took little more than a day.

The case, said prosecutor Brandi Mitchell, was "not a whodunit." There was no question that Rubio pulled the trigger, as witnesses testified. Rubio's attorney, Paul Johnson, hadn't disputed any facts or asked any questions.

During closing arguments, Johnson told jurors Rubio was "entitled to a trial," but the attorney didn't want to insult their intelligence.

"I'm not going to sit here and make a mockery of common sense," Johnson said.

Elizabeth Adams (Facebook )

Adams moved out of Rubio's home while he was asleep upstairs with his live-in girlfriend on May 18, 2016, at the Villa Valencia Townhomes on Rolston Road near Story Road in Irving.

Family members said despite the breakup, Rubio was still controlling and abusive to the mother of his children.

"She just wanted to get away," said Adams' mother, Connie. "She wanted to protect herself."

Adams moved her belongings across a parking lot to her mother's place. Tews and several family members helped. Her two children were staying at her grandfather's home, which was also at Villa Valencia.

James Tews (Facebook )

"It was a good day for her," Mitchell said. "She was moving on."

When Rubio woke up that afternoon, he went downstairs and opened the closet where Adams kept her things, testified Dana Grove, Rubio's girlfriend at the time.

He left their apartment to look for Adams and their children. He came back several minutes later and told Grove the children were at Adams' grandparents' home.

Grove said Rubio was yelling and went upstairs to grab his shotgun. Grove pleaded with him to stop but thought Rubio would use the gun "as a prop."

"I know I should've called the cops, but I called his mom," she said.

Adams' younger brother, John Adams, recalled Rubio showing up at their townhome asking where the kids and Adams were. John Adams said he didn't know.

But Rubio came back 20 or 30 minutes later, this time armed. Rubio put the shotgun against John Adams' head and demanded to know where she was "before she ends up with a dead brother," John Adams testified.

Rubio pushed past him and ran upstairs. He kicked in the door to one bedroom, threatened a family friend and then went into Timothy Adams' room.

He told the teenager to unlock the bathroom door. Rubio tried to push the door open, but Tews was on the other side pushing it closed.

"He tells James he has one more chance," Timothy Adams testified. "That's when he counts to three and shoots through it."

Timothy Adams could hear Tews "gasping for air."

Crime scene photos showed Tews' body slumped against the bathroom door. Rubio shot through a second door to get to Adams, who had been hiding in the shower.

Rubio left, went back home and told Grove, "I did it. I killed them. They're dead."

He then gave her the gun, Grove said, and "put it between his eyes and told me to shoot him."

Police showed up. Grove could hear them outside the apartment, and she told Rubio to turn himself in. He did.

He initially told police that he heard voices but later said that wasn't true. Johnson had Rubio evaluated by a mental health expert, and Rubio was found to be sane at the time of the crime.

Prosecutors did not offer him a plea deal, which would have given him a chance at parole.

During the trial, Rubio smiled several times and gestured reassuringly toward his family when he was led in and out of the courtroom.

When the sentence was announced, Rubio seemed unfazed. He grinned at his family, pointed to his rosary around his neck and gave them a thumbs up.

"Watching you laugh, smile, make gestures," Diane Tews told her son's killer after the sentence, "was sickening to watch."

The mother of Rubio's other victim said she wished he had spared the man who wanted to give Elizabeth Adams what Rubio couldn't.

"Lizzie just wanted to be happy," Connie Adams told Rubio after he was sentenced. "She allowed it for you. You should've allowed it for her."