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John Bittrolff (born July 1, 1966) is an American convicted murderer and former suspect in the Gilgo Beach serial killings case. In July 2014, he was charged with the murders of Rita Tangredi and Colleen McNamee. He was also a suspect in the murder of a third woman, Sandra Costilla, prior to the capture of alleged serial killer Rex Heuermann.
The Gilgo Beach serial killings were part of a series of murders spanning from the early 1990s until 2011. Many of the victims' remains were found over a period of months in 2010 and 2011 during a police search of the area along Ocean Parkway, a road near the remote beach town of Gilgo on Long Island in Suffolk County, New York.
Then, in 2014, authorities caught a break: A DNA sample taken from Bittrolff’s brother proved a partial genetic match to semen found on the bodies of Tangredi and McNamee.
A Y-DNA test analyzes similarities in Y-chromosome DNA markers, corresponding to specific locations on the Y chromosome. Markers have a Short tandem repeat (STR) that involve repeats of 2–5 DNA base pairs. At Sorenson labs, the number of STRs in a 36-marker haplotype was compared between the sample given and the database to determine relatedness.
A surname DNA project is a genetic genealogy project which uses genealogical DNA tests to trace male lineage. In most cultures, there are few or no matrilineal surnames, or matrinames, [1] so there are still few or no matrilineal surname projects. However, DNA tests are equally important for the two sexes (see genealogical DNA test).
The project was involved in the case of Kingsport John Doe (2003). The case was solved through an amateur sleuth's tip and the decedent identified as Jerry D. Holbert from Charleston, West Virginia. [53] The project was involved in the identification of a severed leg found floating in Buena Vista Lake in Kern County, California, on July 28 ...
The DNA Doe Project, a tax-exempt organization with a mission to identify John and Jane Does and return them to their families, is now asking for the public's help finding the Luce County John Doe.
Colleen M. Fitzpatrick (born April 25, 1955) is an American forensic scientist, genealogist and entrepreneur. She helped identify remains found at the crash site of Northwest Flight 4422, that crashed in Alaska in 1948, and co-founded the DNA Doe Project which identifies previously unidentified bodies and runs Identifinders International, an investigative genetic genealogy consulting firm ...