Police officers are seen at Lewes Street in Brighton wearing gas masks and protective clothing.
Jane Adetoro, Christina Walters, and Rebecca Walters died off Brighton beach on May 13.
Brighton Beach Patrol says it needs more funding for its quad bike patrols after three women die.
The woman and another motorcyclist, both from Bognor, were both involved in the crash in Ford.
Lorraine Mitchell helps other stalking victims and is calling for more protection for them.
The alleged offences relate to the detective inspector's role as a football coach, Sussex Police say.
The Old Police Cells Museum in Brighton opens its doors again, showcasing two centuries of policing.
A 36-year-old woman arrested on suspicion of causing grievous bodily harm has been bailed.
