The 19-year-old had been missing for more than two weeks.
Police said the body of a man has been found in a pond in Epping Forest, Essex.
Pc Ben Hannam, 22, had also pleaded guilty to possession of a prohibited photograph of a child.
The male officer was not charged or suspended over the 2017 allegations.
A review that found officers “did not act in a heavy-handed manner” included no interviews with protesters or witnesses.
The 19-year-old, who has sickle cell disease, was reported missing on March 24.
Dapo Adegboyega has been accused of coercing a congregation member into obtaining a £100,000 loan for him at his previous church before joining SPAC Nation.
Demonstrations can go ahead once “stay at home” rules expire near the end of the month, Boris Johnson’s official spokesperson says.
Dubbed ‘Project Vigilant’ the programme can involve officers attending areas around clubs and bars undercover.
Met Officer Under Investigation After Sharing ‘Inappropriate Graphic’ During Sarah Everard Search Operation
The officer, a probationary constable, was guarding a cordon as disappearance was investigated.
About Metropolitan Police
The Metropolitan Police Service was founded by Sir Robert Peel in 1829. Today its head is commissioner Cressida Dick. The Met police has recently been subject to controversy over allegations some journalists gave money to police for information during the phone hacking scandal. A force is also known as "the Met", "Met Pol", "MP" and "the MPS" and has more than 31,000 officers together with about 13,000 police staff and 3,700 Police Community Support Officers (PCSOs). The MPS is also being supported by 2,500 volunteer police cadets and more than 5,000 volunteer police officers from the Metropolitan Special Constabulary (MSC) and its Employer Supported Policing (ESP) programme. The Metropolitan Police Services covers an area of 620 square miles and a population of 7.2 million.