Georgia officials are still trying to piece together how the athletic 37-year-old got separated from Saturday's gathering at Sunset Cove and ended up dead in Lake Lanier.

His family filed a missing persons report when they lost contact with him over the weekend and still couldn't reach him the following day.

Blalock's jeep was later discovered still parked where he first had left it on Saturday.

No other clues have surfaced yet.

Sources also confirmed a Dekalb Fire Department supervisor additionally reported the firefighter missing when he didn't show up for his regular shift.

According to that same individual, the initial disappearance of Jason Blalock a week ago corresponded with a scheduled vacation that began just the day before he vanished.

An underwater bot and sonar were both used to search the lake area where Blalock was allegedly last seen alive; and on Thursday a dive team finally located his submerged corpse and retrieved it.

Autopsy and toxicology tests will be performed now to determine how Jason Blalock died. Meanwhile his premature and 'unattended death' is still being investigated.

Interestingly enough, in October of 2012 a Tyler Blalock of North Carolina also went missing while attending a party.

The 19-year-old college student was later found "accidentally drowned" in a shallow creek bed with head wounds.

However, it's not clear at this time whether these two Blalock males -- who've met with similarly sad ends -- are somehow related.