In November, police released an image of a male motorcyclist they wanted to speak to in connection with the killings.
The French Gendarmerie released an artist's impression of a motorcyclist who was seen riding in the area shortly before the four murders took place.
The man's helmet was said by Mr Maillaud at the time to be "very particular" and one of only a few thousand models worldwide, with a bottom section which opened laterally to reveal the lower face.
Read more: Man arrested over Alps killings
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Beware! The super-sized spiders are coming. And they seem to be everywhere! But why? A warning - this story is not for the faint hearted!
Homes around London are being invaded by spiders with rising temperatures helping the creepy crawlies grow bigger than usual.
The double Grand Slam winner said he did not regret giving his opinion, but was 'disappointed' at the way he went about it.