Four people, including a 13 month old girl, died in a fiery medical helicopter crash near Chicago.

John Mercure and the TMJ4 I team has investigated the dangers of medical aviation.

A terrible scar in a cornfield near Chicago is all that's left of the medical helicopter that crashed in Aurora, Illinois killing three crew members and an infant girl.

The I Team has discovered some disturbing details about Air Angels Inc, the company that owned the helicopter.

Air Angels Inc. has had two previous crashes; in January 2003 and August 2007. This is their third crash in six years.

Experts like Justin Green say flying a medical chopper is like flying a time bomb. "It's as dangerous as you can get unless you're over in Iraq flying in military aviation," Green told us.

The statistics back up Green's assertion. 12 serious medical helicopter crashes have happened in the last year. There have been 28 deaths. That's ten more than the previous deadliest year.

Christine Negroni is an air safety investigator. "It is an inappropriate cost. You don't kill people to save people," Negroni told us.

Negroni's company, Humanitarian Research Services, points out two other important factors. According to statistics from the Comprehensive Medical Aviation Services Database 50 percent of medical chopper crashes take place between 10pm and 6am and crew members are twice as likely to die in night time crashes.

These were both true in the Aurora crash.

Medical choppers generally don't have a black box. And we've been told that the medical chopper in the Aurora crash also did not have any type of voice cockpit recorder.