Officers are reviewing more video footage of a fight involving a large group of teenagers.
Jersey Police say several people have come forward following a public appeal made yesterday.
A 15-year-old boy - and a man who tried to intervene - were assaulted in Howard Davis Park last Friday afternoon.
No arrests have been made, but the force says the investigation is ongoing.

Tourism bosses concerned about impact of UK autumn budget
Islanders asked about diesel and petrol car phase out
Government 'must act' to protect children from online harms
Jersey's skin cancer rates remain higher than England
Police warn of joyriders as two vehicles are taken
Strive Hotel blocked, £29m Millbrook House Hotel gets go ahead
Tiny Seeds launches campaign for Fertility Awareness Week
Public meeting called on future of Havre des Pas Lido