Mr Badzak had left home to run an errand for his mother, planning to buy orange juice from their local Waitrose and a bagel before heading home.
However he and a friend were attacked in Willesden Lane on February 6, with Mr Badzak suffering fatal injuries and dying at the scene.
Gedel, who was charged with murder and attempted murder, appeared at the Old Bailey via videolink this morning for a preliminary hearing.
“On Saturday February 6 this year, at 5.37pmm, Sven Badzak and a friend were walking along Willesden Road when they were attacked by a gang of six youths”, said prosecutor Anthony Orchard QC.
“Sven Badzak was stabbed so badly he died at the scene.”
MrBadzak was privately educated at Wetherby and Portland Place schools before attending Roehampton University, gaining a degree in sociology and harbouring desires to enter the legal profession.
The 16-year-old boy was also stabbed in the attack was left in critical condition in hospital.
Gedel, from Ilford, did not enter pleas to the charges of murder and attempted murder when he appeared in court today. He wore a face mask during the brief hearing.
Judge Mark Lucraft QC, the Recorder of London, adjourned the case for a plea hearing on June 1. A potential trial date has not yet been set.