1. News reports state "[FONT="]Next came the technique sometimes called “familial DNA” where police look for people who are closely related to a suspected offender."
[/FONT]http://www.theaustralian.com.au/news/nation/the-quiet-techie-life-of-claremont-murder-accused/news-story/f34913420ecf0edf1a4b991994f8254d
[FONT="]
2.This is a relatively new technique being used in Australia using STR
[/FONT]"However, for certain cases, such as sexual assault, examining DNA residing in sex-determining chromosomes can be very helpful during analysis. If the suspect in a sexual assault case is a male (has Y chromosomes) and the victim is female (has X chromosomes), conducting an analysis of the STR patterns in cells with Y chromosomes (referred to as Y-STR) can eliminate from the analysis the cells belonging to the female. Y chromosomes are passed through the paternal line—a brother, father and male children will exhibit the same Y chromosome." http://www.forensicsciencesimplified.org/dna/principles.html
and note above in 2015 NCIDD was updated to include familial DNA searching (explains why it wasn't solved earlier).
3. A male relative must have been identified based upon 1 and 2, which lead to police to BE.
[/FONT]http://www.theaustralian.com.au/news/nation/the-quiet-techie-life-of-claremont-murder-accused/news-story/f34913420ecf0edf1a4b991994f8254d
[FONT="]
2.This is a relatively new technique being used in Australia using STR
[/FONT]"However, for certain cases, such as sexual assault, examining DNA residing in sex-determining chromosomes can be very helpful during analysis. If the suspect in a sexual assault case is a male (has Y chromosomes) and the victim is female (has X chromosomes), conducting an analysis of the STR patterns in cells with Y chromosomes (referred to as Y-STR) can eliminate from the analysis the cells belonging to the female. Y chromosomes are passed through the paternal line—a brother, father and male children will exhibit the same Y chromosome." http://www.forensicsciencesimplified.org/dna/principles.html
and note above in 2015 NCIDD was updated to include familial DNA searching (explains why it wasn't solved earlier).
3. A male relative must have been identified based upon 1 and 2, which lead to police to BE.