I realize there have been two full days of searching the waters at Vallecito Lake with no body turning up. But, I don't think that means much.
I just wanted to point out that, back here in Boston, MA, we had the Franco Garcia case this past winter (Franco, a local college student, went missing from a bar -- surveillance footage caught him walking alone without a coat away from the bar after texting a friend to not leave without him). His phone last pinged in the area of the Chestnut Hill Reservoir so authorities began searching there.
Chestnut Hill Reservoir had a depth of 20-25 feet that was scanned with sonar (versus the Vallecito Lake which is normally 140 feet deep but currently 60-80 feet deep, nearly THREE TO FOUR TIMES AS DEEP as the Chestnut Hill Reservoir). Franco's body was never detected in those 20-25 feet deep waters, despite days of searching.
A month-and-a-half later, a man walking his dog spotted a body floating in about 7 feet of heavily weeded water, approximately 18 feet from shore. It was Franco.
I am simply trying to point out that just because nothing was found in the past two days at Vallecito Lake doesn't mean Dylan is not there. Franco Garcia drowned in waters three to four times less than the depth of Vallecito Lake and LE was still unable to find his body using sonar and all of the scientific methods currently available to us.
As sad as it may be, I think Dylan might still be out there....