Ms Finn told BBC London 94.9 how she had been on a bus with her son just minutes before the attack - but Eamonn decided to get off and walk alone due to heavy traffic.
She said the teenager was approached by three males, who were holding an unknown weapon.
They chased him down the street before slashing him across the neck.
Ms Finn said her son “glanced at them and they became immediately aggressive and confrontational towards him”.Ah, London’s rich diversity again. Those little scallywags. But not YONA, actually:
The suspects have been described as black and/or Hispanic males.Wait, what? Do we have ‘Hispanic’ here as a descriptor?