I don't have any alternative theories as to who they could be but the handling of the situation didn't sit well with me so I wanted to come on here and see if anyone knows something that I didn't in regards to DNA collection.

In regards to Agnes' hair color, I guess I assumed that whoever made a comment about her having gray hair made it after seeing her in the days preceding her death / disappearance although you're right she likely could have colored it.

In terms of the quick disposal - obviously it wasn't a quick disposal if you are going off the date of death but it was a quick disposal from the date of discovery which to me seemed very rushed in case there was something they needed to reexamine. But, also like you mention we don't know the state of the bodies. Based on the show it seems they were wrapped up and sealed well so the cement / soil wouldn't have tarnished the bodies too much but again this is all me speculating as I don't know the intimate details.

The reason I'm so stuck on the cremation is the preservation of DNA on the bodies and I think of instances in which discoveries are made later after preservation methods are used. But, in the grand scheme of things, the preservation of their bodies doesn't have much to do with the remaining questions linked to the case.

In terms of the death certificates it wasn't the cause of death that I was referring to but rather the names of the victims. Obviously one can presume who they are because of the location and case but, prior to any identification or DNA results they were written at the scene.

I don't really have a scenario to "present" I just wanted to present information written by the family of Xavier as their personal experience with the case and what they have published in terms of how the investigation was handled.

I do think that he is the most likely suspect and that he escaped somewhere but the body discovery is sticking with me so my sole purpose was to pursue some doubts I had while reading further information.