The male officer was not charged or suspended over the 2017 allegations.
A father-of-two was found dead in a pool at the entertainer's home. No one has ever been prosecuted for his killing.
Terence Glover also faces 10 charges of attempted murder in connection with the tragedy.
'Kind, Helpful And Lovely': Family Pays Tribute To Boy, 12, Killed In Hit-And-Run Outside His School
Harley Watson was struck outside Debden Park High School in Loughton on Monday.
Police have launched a murder investigation after the fatal collision at Debden Park High School.
39 Vietnamese people died in the trailer found in Grays in October.
Christopher Kennedy will appear in court on Monday morning.
The symbols were found sprayed on vehicles and garages on Remembrance Sunday.
The victims were found dead in the back of a refrigerated vehicle in Grays last month.
The families of the victims have been told, police said.