Season 4

1. Hog Trail

2007-05-04 · 45m

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.

2. Yosemite

2007-05-11 · 45m

Three women go missing while vacationing in Yosemite National Park.

3. House Hermit

2007-05-18 · 45m

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

4. Sniper

2007-05-25 · 45m

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

5. Dead Man's Hollow

2007-06-01 · 45m

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

6. Olympic Bomber

2007-06-01 · 45m

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.