Emergency services rushed to the scene shortly before 8am on Saturday morning.
Nobody else was injured in the incident.
CPS grants Humberside Police permission to charge 25-year-old over death of student in February.
Libby Squire went missing after a night out with friends in Hull.
Young woman's body was recovered from the Humber Estuary six weeks after she disappeared in February.
The former prison officer's victims were praised for their bravery in coming forward.
Police have confirmed it is a small section of human lower leg and foot.
A post-mortem was due to take place this afternoon.
A spokesperson confirmed the force is aware of the footage.