3Dr. David Wexler. Dermatologist Dr. David Wexler paid drug addicts to lend him their names so he could bill insurers thousands for skin surgeries he never performed. The New York City doctor made nearly 2,000 bogus claims. Wexler paid the addicts a virtual pharmacy of narcotics. He received 20 years in federal prison.

4Tramesha Lashon Fox. The Houston high school chemistry teacher wanted to unload her Chevy Malibu because she was tired of the monthly payments. She gave passing grades to two failing students for “stealing” and torching her car so she could collect insurance money. Fox received 90 days in jail and lost her job.

5Dr. Young Moon. Cancer patients died prematurely when the Tennessee oncologist diluted cancer drugs she gave to patients, then billed healthcare insurers $1.3 million for full doses. She received 15 years in federal prison.

6Dr. Michael Rosin. The Sarasota, Fla. skin doctor operated on 865 healthy patients to hike his insurance billings by nearly $4 million. Dr. Michael Rosin diagnosed skin cancer though employees had placed chewing gum and Styrofoam on biopsy slides instead of human tissue. He performed 122 surgeries on one elderly man. Rosin received 22 years in federal prison.

7Marc Thompson. Deeply in debt from lavish living, the former Chicago grain futures executive torched his home for $730,000 in insurance money. He let his 90-year-old mother Carmen die in the basement to make it seem she had set the fire as a suicide. Thompson took Carmen downstairs, then spread accelerant over the walls and set the basement ablaze. He received 190 years in federal prison.

8Robert & Teresa Hammond, Margaret Dillavou & Paul Gaines. Incredibly, the two Union County, Ill. couples videotaped themselves committing a crime: crashing the Hammonds' van into a tree to scam insurance money they needed to pay rent to Dillavou. But Dillavou lost the tape. Her estranged husband found it during an acrimonious divorce and gave it to police. The couples received 24 months of probation.

9Michael & Rudi Apelt. Cindy Monkman fell for a handsome German day-laborer who lied that he was an international businessman. The Phoenix-area woman agreed to marry him just three weeks after they met. Michael Apelt took out $400,000 in life insurance on Cindy 10 days after they married. He and brother Rudi soon stabbed her to death in the desert. Both brothers received death sentences.

10Cynthia Sommer. Cynthia killed her husband, Marine Sgt. Todd Sommer, by poisoning his food with arsenic, then used the life insurance money for a breast job and partying. The San Diego woman had signed up for a dating service just two weeks before Todd died, started seeing another man less than two months afterward, and started going to strip clubs with friends. Sommer awaits sentencing.