Clapham chemical attack suspect Abdul Shokoor Ezedi may be dead after going into the River Thames, police say.
The 35-year-old has not been seen since 31 January, when a corrosive substance was thrown over a mother and her two children.
At a press conference on Friday police said their working hypothesis was that he had gone into the water after last being seen at Chelsea Bridge.
No body has been found and officers said it may never be found.
At the briefing Metropolitan Police officers said Ezedi could be seen on CCTV "walking with purpose" for four miles to the Thames and said his behaviour changed at Chelsea Bridge.
The woman, who police revealed had been in a relationship with the suspect, remains in hospital and there are concerns she may lose sight in one eye. Both children have been discharged.
