Samantha Hayes reportingThere are signs that searchers may be getting closer to finding Lori Hacking's body.
Authorities say they've hand-picked through 45-thousand tons of trash at the Salt Lake County landfill.
They've found "landmarks" they hope mean they're looking in the right area, landmarks like newspapers with dates on or shortly after Lori's murder.
They've also found envelopes from a trash bin at the Psychiatric Institute at the University of Utah. Mark worked there and police think he dumped Lori's body in a dumpster there.
Tomorrow, police officers return to the landfill.
This is the third week of what organizers call "the visual search" for Lori Hacking's body.
Ten hour days, Tuesday through Friday, an average of 20 officers from agencies around the valley. There are no perks for this kind of work, no extra pay.
Officers say they are looking for Lori and their own peace of mind.
The days are long.
Phil Eslinger/ Salt Lake City Police: "For me personally, physically I did not consider how demanding that job would be."
The work is hard.
Phil Eslinger/ Salt Lake City Police: "It's dirty and disgusting, filthy and smelly. And conditions are terrible out there, but you know it's the right thing to do."
For weeks, specialized teams with cadaver dogs picked through thousands of tons of trash and didn't find much.
The officers started searching for Lori Hacking's body in an area that has not been searched before...
Phil Eslinger/ Salt Lake City Police: "And every once in a while you find an article out there that keeps you going. Find a newspaper with a date that's July 17th or 18th."
There are strong clues police may be getting close. They have found business envelopes from the Research Park area where they believe Lori Hacking's body was left in a dumpster.
"I've got three daughters at home and to stop and think about that being their final resting place affected me."
But they don't know if they will eventually find what they are looking for.
Phil Eslinger/ Salt Lake City Police: "This may very well turn out that we spend weeks out here and will recover absolutely nothing. But we were out there for the right reason."
Officers say the search wears on them emotionally, and that by Friday they really need three days off to recuperate.