I think they all just fell overboard:
The head sail got damaged, so they started the engine to aid in taking it down. The two younger guys went forward to work on it, while the 69 year old pointed the boat. The wind and waves were too much and the two forward guys fell over. The old guy, came about, and then went to the rail to help his buddy's, but was knocked overboard by the loose boom (see picture). He was hurt and by the time the two others got to him, the boat was out of reach.
Trust me on this; Older sailors fall over. My usual sailing partner is my 70 year old father, and seriously, he's gone in the water at least 6 times in the last five years. I remember the first time...when I was about 12 years old (30 some years ago), he and I circumnavigated Vancouver Island, long story..but anyway, he went over in the middle of the night (calm seas, light wind) while I was below resting. Fortunately I heard it happen and I was able to get around to him in time, but it was pretty close...