While searching Utah's desert for leads that could tell of Susan Powell's mysterious disappearance two years ago, police found unidentified human remains that could result in a major break in the cold case.

Authorities have said they aren't certain if the remains belonged to Susan Powell, and a medical examiner was on the way to the scene, The Associated Press reported.

Powell's husband is still the only person of interest but has never been arrested or charged.

It's a game of patience at this point, West Valley City Sgt. Mike Powell told The AP. We need to slow down a little bit and identify what it is we found.

Susan Powell was 28 when reported missing on Dec. 7, 2009. She didn't show up for her stockbroker job and was last seen by friends at church and at dinner the previous day, The AP reported.

Her husband, Josh Powell, has told police he left his wife at home around 12:30 a.m. that day to go winter camping with their young sons -- then 4 and 2 -- on the Pony Express Trail, which is about 80 miles west of Salt Lake City.

The 4-year-old has confirmed the trip to police.

In May, there were speculations that remains found in the desert some 50 miles southwest of Salt Lake City might have belonged to Susan Powell. However, authorities has said it was a young adult male.

Authorities have been combing the area near Topaz Mountain in Juab County since Monday. The site is about 135 miles southwest of the location where Susan Powell was last seen in West Valley City, according to The AP.

It added that the father of the missing Utah mom Chuck Cox and his family remain hopeful, but were preparing for the worst.