39-year-old Iheanacho had allegedly flown into a rage after the boy lost one of his trainers in a park in South London.

The boy quietly said “sorry” for losing his trainers, Daily Mail reports.

Prosecutors said Iheanacho lost his temper and “violently assaulted” child model Alex during a trip to the Mountsfield Park in Catford, south-east London.

Iheanacho, who lives in Hounslow, west London, is standing trial at Woolwich Crown Court, where he denies murdering the boy.

"The prosecution said he died at the hands of this defendant, a man who was looking after him, acting as his step-father, violently assaulted the boy, causing him fatal head and stomach injures.

“The defendant is a man who has ever since, we say, done his best to avoid being held accountable for those injuries,” said prosecutor Eleanor Laws QC.

A jury heard that Iheanacho was in a relationship with Alex’s mother, Liliya Breha, and would often stay at her flat in Catford.

The court further heard Iheanacho told one paramedic that Alex had fallen onto his knees and hit his head on the floor, but told others he had fallen from a climbing frame.

Doctors at Lewisham Hospital tried to resuscitate Alex, but a CT scan revealed he was suffering from severe brain swelling, and he was transferred to King’s College Hospital, where he was pronounced dead.

A post-mortem revealed bruises on the youngster’s head, neck, and body, while a pathologist concluded the combination of impact type head injury and blunt trauma to the abdomen was “consistent with inflicted injury.”

The trial continues.