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989 Questions

Last Answer on July 21, 2022

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.

818 Votes

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.

818 Votes

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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?

818 Votes

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.

817 Votes

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On a scale of 1 to 10 how certainly can you look at two photographs and tell whether they are the same individual? Like to show you the photos. Thanks.

Asked by Seligo almost 9 years ago

Sorry but I am not trained in facial recognition and I am notoriously bad with faces. My husband teases me about it all the time.I'm sorry I couldn't help!

816 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.

816 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.

815 Votes

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Forensic Scientist

Ask me anything!

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

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 you wanna be a Forensic Scientist?

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.”

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

Also on Jobstr...

On a scale of 1 to 10 how certainly can you look at two photographs and tell whether they are the same individual? Like to show you the photos. Thanks.

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

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?

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

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 you wanna be a Forensic Scientist?

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.”

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

Also on Jobstr...

On a scale of 1 to 10 how certainly can you look at two photographs and tell whether they are the same individual? Like to show you the photos. Thanks.

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

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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