Joshua Jerome Derriviere Jacques, 28, is being held on suspicion of killing his girlfriend and three of her family. A friend of his girlfriend said that Jacques had only met the family days before.
The suspect, who is in his twenties, knew the four murder victims killed in Bermondsey including recently retired NHS nurse Dolet Hill, 64, a matriarch who was winning her fight against cancer .
Joshua Jerome Derriviere Jacques, 28, the boyfriend of one of the victims, Samantha Drummonds, was inside the property in Bermondsey, south London when police arrived.
A relative of grandmother Dolet Hill, 63, has confirmed she was one of four people found dead at a house in Bermondsey, South East London, in the early hours of this morning.