Season 4

1. Hog Trail

A serial killer is on the loose in central Florida and all police have to go on are the bodies of four mutilated, severely decomposed men.

2007-05-04 • 45 min

2. Yosemite

Three women go missing while vacationing in Yosemite National Park.

2007-05-11 • 45 min

3. House Hermit

In April 1992, an elderly couple is found dead in the trunk of their car at their home in upscale Toronto.

2007-05-18 • 45 min

4. Sniper

The largest police investigation of the decade was mounted to catch a ruthless sniper who terrorized residents of the Washington, D.C. area.

2007-05-25 • 45 min

5. Dead Man's Hollow

Investigators called to a farmer's field find an unidentified burned corpse and use state-of-the-art forensics to find the murder scene.

2007-06-01 • 45 min

6. Olympic Bomber

The 1996 Summer Olympics in Atlanta, Georgia are rocked by a massive pipe bomb explosion. A woman is killed and hundreds injured. Subsequent bombs at an abortion clinic and a gay bar show a similar M.O., and increasing refinement. Police have no clue who is behind the bombings until they receive a letter signed by 'The Army of God', an anti-abortion, anti-gay, white supremacist group.

2007-06-01 • 45 min