On the wedding ring that Dave found it says "two become one" and the jeweler finds a date of February 14th, 1986 on it.
Unbeknownst to Dave, this matches exactly the engraved note on the back of Tom's wedding picture with his first wife.
Larkin: (to Sheriff Underlay) You can help me get the story or you can be the story... it's your choice.
Kira: (to Dave) Everyone thinks my dad's on the take but he just got a lot of insurance money after my mom died.
Lab Technician: (to Russell) There were enormous amounts of hemoglobin... I mean, unless the donor was a dolphin or whale.