Statistically, if this was a stranger abduction, the chances of Dulce being found alive are very slim.
If someone close to the family abducted her, then someone or several people know who he is or even where Dulce is. I would hope someone would come forward, especially now that the reward is higher.
That it has been so long and LE seem to have no leads tells me the chances of a stranger abduction is more likely.
There has to be a trail, if someone is travelling with her it's very strange that there have been no sightings of her or the man, or the vehicle. Nothing at all.
I would think someone would have had to have planned very well to take her far away or out of the country undetected.
Of course that would be the best outcome, as long as she is safe and alive and can be reunited with her family.
It's not looking that way, though.
Imo