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989 Questions

Last Answer on July 21, 2022

Discuss how the following statements can both be true when applied to forensic investigation: “Every contact leaves a trace” AND “Absence of evidence is not evidence of absence.”

Asked by Sara almost 9 years ago

Why does this sound like a homework question?

How to chemically distinguish between an original hand-written signature and a printed copy (the one that is scanned and then printed)

Asked by rixy almost 9 years ago

I'm sure document examiners could do this fairly easily but I don't know exactly how. I would guess that alternative light source (like infrared or ultraviolet spectrums) could show that there is no difference between the signature and the rest of the document. Or I believe thin-layer chromatography could show that the chemical makeup is the same. A Questioned Document Examiner could tell you much more.

814 Votes

So you wanna be a Forensic Scientist?

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What i meant by summary were the things that forensic scientists do when the first see a crime scene till the end of the investigation..... thanks!!

Asked by John over 9 years ago

I'm sorry but that can, and has, fill several textbooks. There's just no way for me to summarize it in a paragraph.

814 Votes

So is there a specific test for nuclear DNA versus mitochondrial DNA?

Asked by L.Randolph about 9 years ago

Yes, they are different substances.

814 Votes

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I don't know how to edit my question to fix the photo link. The pic must be seen in order to provide thoughts on mold & debris vs. decomposing carcass. Thanks http://i834.photobucket.com/albums/zz263/spikeyjax/Mobile%20Uploads/PicsArt_11-01-12.30.19.jpg

Asked by Sleepy about 9 years ago

Sorry I went to the link but it just loaded forever and I coudn't view the picture.

UPDATE: Hey on a whim I tried the link again and could see the picture. Unfortunately I still couldn't make a guess as to what the pile is. Though in my opinion it looks too light-colored to be a decomposing animal.

813 Votes

Can extensive bruising be caused by pushing someone with the palm of the hands on the chest area

Asked by Jay over 8 years ago

I'm not a doctor but I don't see why not. If the flesh and muscle is being crushed between the ribs and the person's hands, that would have to cause damage. Sometimes CPR can cause cracked ribs.

811 Votes

And B) if it is mixed in with other samples of saliva, for example if 4 people spit into a glass and mixed up, could 4 samples of dna be pulled or is all the DNA ruined? Thank yooouuuuu! :)

Asked by sandaM about 9 years ago

As far as I know since they would all be the same type of cells, they could not be separated.

811 Votes

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Forensic Scientist

Ask me anything!

What do YOU do?

Discuss how the following statements can both be true when applied to forensic investigation: “Every contact leaves a trace” AND “Absence of evidence is not evidence of absence.”

How to chemically distinguish between an original hand-written signature and a printed copy (the one that is scanned and then printed)

So you wanna be a Forensic Scientist?

What i meant by summary were the things that forensic scientists do when the first see a crime scene till the end of the investigation..... thanks!!

So is there a specific test for nuclear DNA versus mitochondrial DNA?

Also on Jobstr...

I don't know how to edit my question to fix the photo link. The pic must be seen in order to provide thoughts on mold & debris vs. decomposing carcass. Thanks http://i834.photobucket.com/albums/zz263/spikeyjax/Mobile%20Uploads/PicsArt_11-01-12.30.19.jpg

Can extensive bruising be caused by pushing someone with the palm of the hands on the chest area

And B) if it is mixed in with other samples of saliva, for example if 4 people spit into a glass and mixed up, could 4 samples of dna be pulled or is all the DNA ruined? Thank yooouuuuu! :)

Forensic Scientist

Ask me anything!

What do YOU do?

Discuss how the following statements can both be true when applied to forensic investigation: “Every contact leaves a trace” AND “Absence of evidence is not evidence of absence.”

How to chemically distinguish between an original hand-written signature and a printed copy (the one that is scanned and then printed)

So you wanna be a Forensic Scientist?

What i meant by summary were the things that forensic scientists do when the first see a crime scene till the end of the investigation..... thanks!!

So is there a specific test for nuclear DNA versus mitochondrial DNA?

Also on Jobstr...

I don't know how to edit my question to fix the photo link. The pic must be seen in order to provide thoughts on mold & debris vs. decomposing carcass. Thanks http://i834.photobucket.com/albums/zz263/spikeyjax/Mobile%20Uploads/PicsArt_11-01-12.30.19.jpg

Can extensive bruising be caused by pushing someone with the palm of the hands on the chest area

And B) if it is mixed in with other samples of saliva, for example if 4 people spit into a glass and mixed up, could 4 samples of dna be pulled or is all the DNA ruined? Thank yooouuuuu! :)

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