The answer, which was "yes, and we have the evidence to prove it"... was to a pretty extensive question involving the murder, the burying, and taking the truck down to the border and if he could do it by himself... it is also the answer I would expect from a District Attorney who has charged Merritt.
The Prosecutor in the OS's seems to concede that there is going to be some unanswered questions:
From opening statement:
CONCLUDES
Ladies and Gentlemen we talked a little bit about in jury selection and Mr Imes talked to you about unanswered questions. There will be some in this case. We can’t tell you whether or not someone helped the defendant either during the commission of the crime or after. Certainly it would suggest two grown people need to be moved, we can’t answer all of the questions, but we can answer the who, [video skips] he was ripping off his ‘best friend’ and got caught and we can tell you that the evidence is going to show in this case that the only person in this case that’s associated with the McStays that had a connection to the High Desert is the defendant. Everyone else is San Diego county, Riverside county, Orange county. The only connection to the High Desert in this case is that man right there. We can tell you the how, we can tell you the why, and we can tell you the who, and at the end of this case we’re going to give a closing argument and we’re going to ask you to find him guilty and to hold him accountable. Thank you.