A police guard remained outside the al-Hilli family home in Claygate, Surrey, today as searches at the detached house continued.
This afternoon officers carried out a fingertip search of the drive, front garden and front hedges. Later, an officer was seen drilling holes into an overhanging roof in the porch area of the home.
Brett Martin, the first witness who found the British family in the Alps has described the moment he came across the attack.
A friend of the al-Hilli family has said he believes he could assist the investigation into the fatal shootings of the three family members.
A previously unreported witness has told a French paper how he came across the aftermath of the killings of the al-Hilli family in the Alps.