I resemble your remark.
If he is eaten up in the swamp, and you also know that there would be little left after even 3 days,just maybe the swamp critters left his jaw so they can do a dental ID.
POS. Killed his lover and then offed himself. Sicko.
It could be a decoy corpse and the parents in on it.( Oh yes, thats our son,,,,,,,)
“It could be a decoy corpse and the parents in on it.( Oh yes, thats our son,,,,,,,)”
Dental records/ DNA would tell the tale.