Hello Lola.
It's ok to ask anything, I just will tell you I won't reply to a question if for any reason I do not want to.
No, I don't know the family. We grew up in this crowd of people on the coast , I am roughly Daniel's age and can see through him/relate closely, also my family are same ages and an in law ( and acquaintances) I mentioned was/are very much his way ( i.e. lifestyle etc.). Anyone might say I don't know the people so I don't know their character, no matter . He would not do this, even if he were depressed etc. Liam would not agree.
The family would be centered around Daniel, as in he would be the reference decision maker, so now they haven't that to keep them centred or rely on, even if there were differences in the family.
I have spent many hundreds of hours exploring inland from the coast off track or on dirt lanes. If they came off the road there at the sort of speeds possible they would almost always walk away, plus there are few places that a car would go unnoticed - in a month there are always people passing. Some places inland lose phone coverage ( valleys) but their last positions should be registered to indicate an area. I really don't see them heading off into the hills to do a bit of rally, but it has to be a possibility. A home of ours overlooks Valle Romano, though I am from further east (but now out of the country further west for a stay).
Someone will know where they went, if it was clandestine it is a question of encouraging them to say as contacts are brief and informal at this level. I won't go into that side of it for now, I will wait till the police say it is a criminal investigation or similar. The family, unless they actually have a firm line of pursuit that they are not revealing, have to group and organise. It has to be done, it cannot be left trailing in the hands of others. I will post more detail on local reality re. authorities in a bit, I just woke up.
This is a message to potential informers, I'll say it only once in the off-chance that there is something to be informed of and that any are reading this. Though we don't know yet what has happened, it will be discovered .
Anyone close to the family, or working with Daniel : If you have information that might jeopardise you before the law, but which will help the police narrow their search, find a way to hand that information in anonymously all the same. Only the police are able to mobilise resources to the degree needed here, it is no longer a case of standing or retribution, and to inform the police will not deny you those either if that were already a choice. To anyone local who fears reprisal from outside the law for giving information, you are on the wrong side - the distance you will go is less and more uncertain than if you step aside and provide information. There are rules and codes of honour in this world, if anyone has broken them with regards to Daniel and Liam, they will be ending up at the very bottom of the pile of everything that goes on along the coast. That is not a threat or a promise, that is the cold reality of the world around. So step aside from that and hand in the information.
I'm sorry to speak like this, it has to be said.