AngTxGal
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This article is four years old but it shows why small towns who cannot afford it often call in FBI technology in high profile cases.
FBI plans ‘Rapid DNA’ network for quick database checks on arrestees
New machines create DNA profiles in less than two hours, rather than days or weeks
“A “Rapid DNA” machine can analyze the DNA in a swab and produce a profile of 20 specific loci on the DNA strand in less than two hours.
Some local police departments and prosecutors have been using Rapid DNA machines for about five years to solve crimes.”
I don‘t think Sample Running is the slowest step here, I think it is Collection and Analysis/ Comparison
What is Needed? An Unknown or Known DNA Profile that Cannot due to Identity or Location have come from any other person other than the perp
Why so Complicated? party house with many friends and family visitors plus friends of friends, bloody ‘messy’ crime scene, 2-3 rooms plus possibly pathways of travel, 4 victims
There would be thousands of locations that have the possibility to contain perp DNA- it is Sample Collection that is critical- They don‘t know if the profile is good and is left from elimination until all comparisons are made.
Collections for DNA extraction-
Known Identity Presumed Friendly
- roommates alive and deceased
- all other people in the house that day, recently
- volunteer or warrant samples from anyone near victims in last days- friends/family, driver, patrons grub truck Bar frat party, delivery, maintenance, neighbors
Unknown Identity Friend or Perp??
- strategically collect from house walls/floors/ furniture/doors that could contain perp DNA
- collect from victim bodies, linens, beds, any perp fluids containing DNA, and hair
Compare/ Eliminate- remove all Known Identity Presumed Friendly DNA profiles from all
Unknown Identity Friend or Perp DNA Profiles
What is Left? One or more than one of these-
- A Known Identity DNA Profile- Why is this Friendly profile found in location that is consistent with the perp?
- An Unknown Identity DNA Profile
Compare all Left to databases of offenders
Link Perp DNA Profile to an Identity using other means
Not a needle in a haystack…
More like searching for a Perp Striped Needle in a field of haystacks containing striped needles. And… they do not know the Perps Stripes
I don’t see how they could be there yet- unless they were very lucky
I would be very interested to hear from anyone who works in touch DNA- it seems this would add a nearly infinite number of possibilities
In my opinion