After Rose Marie Moniz was found dead in a pool of blood in her New Bedford, Mass., home in March 2001, investigators determined the 41-year-old had been beaten to death with.
Investigators determined that injuries to the victim's face had been caused by the spiny exterior of the conch shell, and testing of the interior revealed a full DNA profile.
After a brutal murder in Massachusetts went unsolved for 20 years, a conch shell helped authorities lead to the arrest of the woman’s half-brother, according to the District Attorney.