The Metropolitan Police have welcomed the new Portuguese investigation, but warned that there was still "a way to go."
This is a welcome development, but both sides of the investigation are at relatively early stages, with much work remaining to be done. This new momentum is encouraging, but we still have a way to go, and as with all major investigations, not all lines of enquiry that look promising will yield results.
More top news
The move, which had been expected, was made on the recommendation of FBI disciplinary officials.
The voicemail left on a landline was not heard by a state DoT employee until Friday.
Officers were called to the house at 7.43pm on Friday, and a 35-year-old man was arrested on suspicion of murder two hours later.