Trial Thread 4/11/2012

[Sailor Bug]

Next witness is Jennifer McLean, a biology expert at the Centre for Forensic Science she does body fluid and DNA analysis

Jennifer McLean is an expert in body fluid identification and DNA analysis

RaffertyLFP: The court is going through McLean's qualifications as a DNA expert

She's a body fluid identification and DNA expert. Derstine content. Carnegie going over her qualifications.

Her list of qualifications is long. Explaining her career path.

 

[Sailor Bug]

She's been testifying as an expert witness since 2006.

There's an admission from both sides. 1. Blood samples were collected from Rafferty, McClintic and Tori. 2. Continuity is not an issue.

RaffertyLFP: The court hears that blood samples were taken from Rafferty. McClintic were sent to the Centre for Forensic Science

DNA profiles have been built for all three. DNA from Tori's parents was used to build her's.

Crown reads an admission (agreed upon facts) that says DNA profiles for McClintic, Rafferty and Tori Stafford were made from blood samples.

The centre was able to work up blood profiles for Rafferty and McClintic as well as Victoria Stafford using samples from her parents

McLean showing the jury the types of work she does. She examines items for blood, semen or saliva. She also does DNA testing.

 

[Kamille]

interesting the blade was removed from the knife... why did he keep the handle?

I'm not convinced yet that it is the knife in question. Usually when you break something that you like to use, you go and buy a replacement. So IMO, there may have been another blue knife that replaced the broken one and has now gone the way of the car seat.

MOO

 

[Sailor Bug]

McClean is take the court through a primer on how DNA and body fluid testing is done at the centre

McLean is presenting the jury with a PowerPoint presentation that explains how body fluid and DNA tests are done

McLean is taking the court through a primer on how DNA and body fluid testing is done a the centre

RaffertyLFP: McLean explains how the centre tests for the presence of human blood using various chemical tests

 

[nettie_82]

I'm not convinced yet that it is the knife in question. Usually when you break something that you like to use, you go and buy a replacement. So IMO, there may have been another blue knife that replaced the broken one and has now gone the way of the car seat.

MOO

I believe another sleuther here stated they have the same kind of knife as the one pictured and it is the kind you can buy replacement blades for. So the knife wasn't necessarily broken. JMO

 

[Sailor Bug]

She's explaining how they determine if blood is on an item. They have multiple staged testing.

McLean says scientists test for blood, and then another test is done to determine if it's human blood

Explaining how they find semen on items as well. She has a detailed slide show.

McLean is explaining how the centre tests semen and saliva samples using visual and chemical means

There's also a slide explaining how saliva is tested for.

 

[SideKick]

Thank God for experts in the field of forensic's!

 

[Wondergirl]

11:09
RaffertyLFP:
Doupe is explaining how the centre tests semen and saliva samples using visual and chemical means [via Twitter]

 

[Sailor Bug]

McLean also details how tests for semen and saliva are done. Body fluid tests identify where DNA testing needs to be done

After finding fluids, they are submitted for Deoxyribonucleic Acid testing (DNA).

McLean goes on to describe how body fluids are then sent on for DNA analysis She describes the nature of DNA

Majority of human DNA is the same. Small potions are different, which is what McLean focuses on.

McLean describes how DNA is unique to individuals and how she compares DNA profiles to identify individuals

 

[Kamille]

I believe another sleuther here stated they have the same kind of knife as the one pictured and it is the kind you can buy replacement blades for. So the knife wasn't necessarily broken. JMO

Probably correct. Here is an example of one still for sale...

http://www.canadiantire.ca/browse/p...T<>prd_id=845524443250308&bmUID=1334157056578

 

[mkozub]

I believe another sleuther here stated they have the same kind of knife as the one pictured and it is the kind you can buy replacement blades for. So the knife wasn't necessarily broken. JMO

Yes I have the same knife you can buy replacement blades for it.

 

[Sailor Bug]

Showing the DNA profiles of two people, and how their child's DNA profile could be predicted.

A nanogram of DNA is needed for testing. Same weight as a smartie broken into a million pieces.

McLean is describing the process for extracting and identifying DNA samples

McLean is identifying the process of extracting and identifying DNA profiles

McLean is describing how she can determine if a DNA sample is derived from one individual or a group of individuals

 

[SideKick]

I tend to think this blue knife maybe another one... Not the one used at the scene. Why? Why the heck would he keep it and put it back into the tool box!?

 

[Sailor Bug]

Now explaining mixed DNA, and how it's tested.

McLean explaining DNA matches, and "random match probability."

Jennifer McLean explains to the jury what it means to have a DNA match. Could be person in question, could be random coincidence.

In the case if evidence found in this case, chance of random person matching Tori's DNA is 1 in 28 billion.

RaffertyLFP: Court breaks for 20 minutes. McLean's testimony will continue

 

[~n/t~]

I tend to think this blue knife maybe another one... Not the one used at the scene. Why? Why the heck would he keep it and put it back into the tool box!?

He probably thought getting rid of the blade would do the trick. Same as keeping his pea coat jacket. Why didn't he throw it out with the rest of the evidence?

Most criminals get caught by their own stupidity. Thank God!

 

[SideKick]

Yes ~nt~, oh I'll just put the knife back, afterall, the blade isn't there... no one would ever think it was used. He obviously thought he could get away with this.... and the P coat. What a hoot, thank God again for being an air head MR.

 

[Sillybilly]

I tend to think this blue knife maybe another one... Not the one used at the scene. Why? Why the heck would he keep it and put it back into the tool box!?

We can ask that same question of the pea jacket ... why would someone who was supposedly so horrified at witnessing the murder of a child keep anything that might remind them of such a trauma?

IMO, certain things are kept by killers so they can keep an item close and relive, over and over again, the thrill of the moment. On the other hand, could simply be that he places importance on the blue knife and his jacket.

 

[Kamille]

I tend to think this blue knife maybe another one... Not the one used at the scene. Why? Why the heck would he keep it and put it back into the tool box!?

Maybe he got the boxed set and kept the smaller one in his car for those times when you just feel like cutting out chunks of your back seat?

http://www.canadiantire.ca/AST/brow...Piece+Folding+Utility+Knife+Set.jsp?locale=en

MOO

 

[~n/t~]

Yes ~nt~, oh I'll just put the knife back, afterall, the blade isn't there... no one would ever think it was used. He obviously thought he could get away with this.... and the P coat. What a hoot, thank God again for being an air head MR.

Also, we have to remember, he and TLM had a deal. She would take the fall. So he had nothing to worry about. Too bad TLM couldn't keep her mouth shut, eh? :jail:

 

[~n/t~]

Now explaining mixed DNA, and how it's tested.

McLean explaining DNA matches, and "random match probability."

Jennifer McLean explains to the jury what it means to have a DNA match. Could be person in question, could be random coincidence.

In the case if evidence found in this case, chance of random person matching Tori's DNA is 1 in 28 billion.

RaffertyLFP: Court breaks for 20 minutes. McLean's testimony will continue

bbm :rocker: