Police were called to Emslie Horniman's Pleasance Park at around 7.20pm on 21 July 2024 following reports of a shooting.
CCTV showed a man calmly approaching the children's play area before firing a single shot.
Rene Graham, 15, suffered a gunshot wound to the chest and died at the scene.
Aderahman Boumzough, 25, of no fixed address, appeared at Woolwich Crown Court on Friday, where he was found guilty of the murder following a two-week trial.
Footage also showed the suspect chasing and attempting to shoot a second victim, but the gun jammed and he fled.
In March 2025, Rene's mother, Janay John-Francois, issued a plea urging the public to come forward with any information, telling Sky News: "It's broken, shattered my life... It's killing me on the inside."
Read more from Sky News:
Tributes to 'devoted mum' killed after train hit car in Lancashire
Threat of thunderstorms after June heat record broken
A £20,000 reward was also offered by Crimestoppers for information that would help solve the crime.
During their investigation, police used forensic work, witness enquiries, and detailed analysis of CCTV tracing the suspect's movements.
Boumzough was arrested on 2 September 2025 and charged with murder and attempted murder the next day.
Police subsequently uncovered a video on Boumzough's phone in which he rapped while appearing to reference the firearm malfunction.
He said: "Don't you hate it when your ting jams? I was prepared to take soul, but Allah had a different plan".
Boumzough was found guilty of murder and attempted murder following a two-week trial. He will appear at Woolwich Crown Court for sentencing on 3 July.
A senior Met detective thanked a small pocket of the Ladbroke Grove community for their support in the case.
Detective Chief Inspector Alison Foxwell, who led the investigation, said: "Following Rene's senseless murder, we made a direct plea to both the Ladbroke Grove community and those who had attended the event where he lost his life. A year on, we renewed that appeal, urging anyone with information to come forward and help us secure justice for Rene's family.
"As part of that appeal, we released CCTV footage showing Boumzough pulling a firearm from his pocket in broad daylight, fleeing the scene, and attempting to shoot a second man as he made his escape.
"While only a small number of people came forward, I would like to thank those individuals who provided statements and supported the investigation, including attending court, who refused to allow a dangerous individual such as Boumzough to live amongst them.
"This conviction is the result of relentless work by officers who painstakingly reviewed hundreds of hours of CCTV footage to trace the gunman's movements before and after the shooting."
The Tropical House where the crocodiles are kept at Johnsons of Old Hurst, a zoo in Huntingdon, was closed following the incident on 18 June.
The zoo confirmed in a social media post that its "whole site will be fully open" on Saturday, nine days after a child was allegedly thrown into the pit.
The post reads: "Public announcement. As of this weekend, our whole site will be fully open, thank you."
A spokesperson for the zoo confirmed this included the crocodile attraction.
The boy, from Cambridgeshire, who is now in a stable condition in hospital, was attacked by at least one crocodile after he ended up in their pit.
He was taken to Addenbrooke's Hospital, where he was initially described as being in a critical condition.
Read more from Sky News:
Man convicted of murdering boy in children's play area
Tributes to 'devoted mum' killed after train hit car
A 30-year-old man from Norfolk was arrested on suspicion of attempted murder but was later bailed after he was "assessed as not being fit for interview", Cambridgeshire Police said.
The boy was said to have suffered "serious injuries" in the enclosure.
Meanwhile, an investigation has been launched after the medical records of the boy were accessed by around 40 members of hospital staff.
Cambridge University Hospitals (CUH) has referred itself to the Information Commissioner's Office (ICO) and is investigating whether all the staff members had a legitimate reason for viewing his information.
The Department of Health and Social Care said on Friday it was also investigating.
The zoo is home to more than 100 animals, including crocodiles, Bengal tigers, African lions, capybaras, meerkats, and sloth bears, according to its website.
The tropical house building where the crocodiles are kept is a converted cattle barn.
Authorities in the Chaoyang business district gave the casualty figures as it confirmed a two-seater sport plane had crashed at 5.55pm.
The statement on WeChat did not comment on the cause but said an investigation was under way.
It also didn't name the building involved. However, footage online showed debris falling from the 528-metre CITIC Tower, also known as China Zun, in Beijing's central business district.
Two bystanders told Reuters news agency the plane was no bigger than a car.
Dozens of police cars and several fire trucks lined the roads around the building and two glass panels appeared to be damaged.
Police stopped some people from taking pictures and asked others to delete those they had taken.
One witness, a courier, told Reuters he'd taken a video of the plane sticking out the building but deleted it out of fear of being caught by police.
Read more from Sky News:
Rescue efforts through the night after deadly quakes
British TikToker could face death penalty in Dubai
The courier said he had rushed over to the tower at around 6pm after hearing the crash.
"It was so loud - louder than fireworks," he said.
Posts of the building were quickly removed from Chinese social media on Friday.
"Two people were in the car and sadly Kerry Coombes, a 33-year-old woman, was pronounced dead at the scene," British Transport Police (BTP) said in a statement.
The force said it had launched a criminal investigation into the crash in Hoghton, shortly before 8.50am on Thursday, describing it as a "shocking and tragic incident".
"An eight-year-old girl remains in hospital in a critical but stable condition," the statement added.
Fire crews and ambulances were called to the scene with BTP. No other injuries were reported by passengers on the train.
Officers have not described the relationship between the woman and girl, nor elaborated on what happened, but have asked the public not to speculate about the circumstances.
Ms Coombes' family paid tribute in a statement and said she "brought so much love, laughter and kindness".
"Kerry was a loving daughter, sister, partner and devoted mum who meant everything to us.
"She had the biggest heart, always put other people before herself and brought so much love, laughter and kindness into the lives of everyone who knew her.
"The loss of Kerry has left a hole in our family that can never be filled. We are heartbroken and are trying to come to terms with what has happened."
Senior investigating officer, Detective Chief Inspector Paul Attwell, said: "This was a shocking and tragic incident, and our specialist officers will continue to support Kerry's family and friends throughout this ordeal.
"Following our initial enquiries, a criminal investigation into the incident has now been launched, and I would ask the public not to speculate, as further updates will be provided in due course."
Read more from Sky News:
US rapist, who fled justice, dies
How is the NHS coping in heat?
Driver helps police catch criminal
He added that the force was continuing to appeal for witnesses or those with information to come forward.
The Rail Accident Investigation Branch said on Thursday it had sent a team of inspectors to the crash site who were "gathering evidence as part of a preliminary examination".