A Florida jury on Tuesday found a man guilty of first-degree murder for dropping his 5-year-old daughter off a bridge four years ago, despite arguments from his attorneys that he was insane and thought his actions would actually save her. He was automatically sentenced to life in prison.

Jurors in Clearwater, Fla., deliberated for about seven hours over two days before convicting John Jonchuck, whom prosecutors portrayed as a vengeful man who planned to kill his daughter to keep her away from her mother and grandmother.

The Tampa Bay Times reported that no one from Jonchuck’s family was in the courtroom when the verdict was announced. And no friends or relatives spoke on behalf of Phoebe or her father before the sentencing. Jonchuck, who was stoic when the verdict was read, hugged his attorneys and said, “Yes, your honour,” when asked if he understood that the verdict carries an automatic life sentence. He was then fingerprinted and taken out of the courtroom by bailiffs.

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Defendant John Jonchuck hugs his attorney Jessica Manuele after a jury found him guilty, Tuesday, April 16, 2019, Clearwater, Fla. Scott Keeler/Tampa Bay Times via AP, Pool

Jonchuck’s lawyers had asked the judge to delay sentencing for a week because they have some issues to check. But when they failed to provide a reason, Judge Chris Helinger proceeded with the sentencing.

“I am satisfied that justice was done,” the newspaper quoted Pinellas-Pasco State Attorney Bernie McCabe as saying. “My immediate reaction is killing children doesn’t make one a very sympathetic character.”

READ MORE: Florida police say girl was alive when father threw her off bridge

The judge thanked jurors for their attention during the monthlong trial. “There’s no way I can express my appreciation for your service,” she said. “I’ve never had a trial this long and I’ve been here about 12 years as a judge.”

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No one disputed that Jonchuck, now 29, dropped his daughter, Phoebe, 62 feet (18 metres) into Tampa Bay in January 2015, and that he had a long history of mental problems.

In this March 21, 2019 file photo, John Jonchuck appears before Judge Chris Helinger during his trial at the Pinellas County Criminal Justice Center in Clearwater, Fla. A prosecutor says a Florida man who threw his 5-year-old daughter off a Tampa Bay area bridge knew what he was doing was wrong, and that he should be found guilty of first-degree murder. Scott Keeler/Tampa Bay Times via AP, Pool, File

But prosecutors claimed his action was premeditated. Assistant state attorney Paul Bolan told jurors that Jonchuck was motivated by anger over worries that Phoebe’s mother was going to take the girl away from him and his own mother’s doting attention to her granddaughter when she had been inattentive to him growing up.

“It was rage that drove him to it on top of that bridge,” Bolan said. “Did he know what he was doing, and did he know it was wrong? The answer is clearly yes.”

'I'M NOT GONNA LET HER BE ATTACKED FOR HER DRESS': Judge in John #JonchuckTrial shuts down defense attorney for bringing up how psychiatrist dressed while examining Jonchuck https://t.co/4oGWag4ckO pic.twitter.com/gPwgeLrBKz — WFLA NEWS (@WFLA) April 11, 2019

This is who this trial was about. 5 year old Phoebe. After four years after being thrown to her death by her father, John Jonchuck was just found guilty for first degree murder. pic.twitter.com/r11HtusIVc — Jennifer Titus (@jenntitus10) April 16, 2019

But assistant public defender Jessica Manuele told jurors Jonchuck loved Phoebe more than anything else in the world and that there’s no evidence he acted out of “unbridled anger.”

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His delusions led him to believe Phoebe was possessed and that the archangel, Michael, was coming, Manuele said. He poured salt outside her window to keep spirits away, she said.

At the moment he threw her off the bridge, “he thought he was protecting his daughter,” Manuele said. “It will never make sense because it’s insanity.”

Twelve hours before Phoebe’s death, Jonchuck’s divorce lawyer, Genevieve Torres, called a state child protection hotline, fearing for the girl’s safety, authorities said.

Michelle Kerr, mother of Phoebe Jonchuck, wipes her eyes as she leaves the church after memorial services for 5-year-old Phoebe Jonchuck at Lake Magdalene Methodist Church in Tampa on Wednesday, Jan. 14, 2015. AP Photo/The Tampa Bay Times, Eve Edelheit

Torres told the Department of Children and Families operator that Jonchuck had driven to three churches in his pajamas with Phoebe in tow that morning, called Torres “God” and asked her to translate his stepmother’s century-old Swedish Bible, which he carried and had become obsessed with. Jonchuck was also paranoid that Phoebe wasn’t his child, Torres said.

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But the operator thought the attorney was more worried about Jonchuck’s safety than the girl’s and did not report the call to authorities, they said.

Just after midnight the next day, Jonchuck’s PT Cruiser raced past officer William Vickers, who was heading home from a shift in his patrol car. He started following Jonchuck, but never got close enough to read the licence plate and didn’t know Phoebe was inside, authorities have said.

St. Petersburg Police officers take John Nicholas Jonchuck from police headquarters downtown to the Pinellas County Jail, Fla., on Thursday, Jan 8, 2015. Jonchuck, 25, drove toward a bridge over Tampa Bay pulled his car over early Thursday, took his 5-year-old daughter from the back seat, pressed her head to his chest, and tossed her over the rail, according to police in St. Petersburg. AP Photo/The Tampa Bay Times, Zachary T. Sampson)

As they reached the bridge’s crest, Jonchuck stopped and got out. Vickers, fearing an ambush, stopped behind him, pulled his gun and yelled at Jonchuck to show his hands. He saw no weapon.

Jonchuck yelled at the officer, “You have no free will.” He grabbed Phoebe from the back seat, held her over the side momentarily and then dropped her, according to police accounts.

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Jonchuck drove off but was soon arrested. Vickers scrambled down a ladder to a dock below the bridge but couldn’t see Phoebe in the dark water. A marine rescue boat was summoned, and her body was found hours later.