Marcus Aurelio Arduini Monzo, 36 (11.04.88) has been charged with the murder of 14-year-old Daniel Anjorin.
His family are being supported by specialist officers as detectives continue their investigation at pace.
Cliff Mitchell, 24 (14.11.99) of Putney was convicted in February of ten counts of rape, three counts of rape of a child under 13, one count of kidnap and breach of a non-molestation order following a trial at Croydon Crown Court.
A reward of £20,000 is on offer for information that leads to the identification, arrest and prosecution of the person responsible for Darren Augustin's murder.
The four men were jailed for a combined total of 89 years.
A man who carried out two rapes over a 14-month period has been jailed after detectives tracked him down using an image on a social media feed.
