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News: Innocent drivers test positive for drugs

wazza

Bluelighter
Joined
Jun 24, 2001
Messages
4,620
Location
Victoria
Couldn't see this on the 1st page, thought it could be interesting and/or good for HR (as in appealing if someone thinks they "might" be on/off with testing positive to illicit drug use but do test positive. As in, someone may have had drugs 1-3 days ago, tested positive but think/know they shouldn't be testing positive.

Anyway, from http://theage.drive.com.au/motor-news/innocent-drivers-test-positive-for-drugs-20101101-179yx.html

Innocent drivers test positive for drugs
Reid Sexton
November 1, 2010 - 3:36PM
Nearly four per cent of people who test positive for drug driving in Victoria and have their licences temporarily suspended are innocent, it emerged today.

Victoria Police today admitted that wrong results were part of the testing process but said it would not change its procedures.

Under the current system, drivers' saliva is tested for cannabis, ecstasy or amphetamines at the roadside and banned for up to 12 hours if they return a positive result.

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But penalties or permanent bans are not issued until the sample is tested at a drug laboratory, which police say is 100 per cent accurate.

The new statistics emerged after it was revealed today that Geelong man Rory Lalor recently recorded a false positive test and was banned from the behind the wheel for four hours.

Mr Lalor paid $115 for an independent test that showed his system was free from illegal drugs, but Victoria Police said yesterday he would never have been fined or banned from driving permanently because his saliva swab was found negative by its laboratory.

Inspector Martin Boorman said today that false positives could be returned if equipment was faulty, if a test was not conducted correctly or if the sample itself was problematic but did not elaborate on the last point.

He said they were an unfortunate part of the procedure and that 62 of 1618 drug-driving tests sent to the laboratory, or 3.8 per cent, between 2004 and 2009 had been found to be false.

But he said Victoria Police would not be changing its methods.

"I apologise for the inconvenience of these people, but I make no apologies for what we're doing," he said.

Inspector Boorman said police had detected 1556 drug drivers that were potentially a danger to themselves and others on the road.
 
Thanks for posting this Wazza.

Inspector Martin Boorman said today that false positives could be returned if equipment was faulty, if a test was not conducted correctly or if the sample itself was problematic but did not elaborate on the last point.

That is interesting.....
 
Thats odd,
this might be more a question for P_D or one of the other clever mods, but how do such tests give false positives? Wouldn't there HAVE to be certain chemicals to give such results, also how did they find out later that some people were innocent of such crimes? This interests me alot, I will say this though 3.8% is not nearly good enought, thats one in thirty people, which is fucked and they should absolutely apologise.
 
"I apologise for the inconvenience of these people, but I make no apologies for what we're doing," he said.

Some might understand his point, but I would cry "guilty until proven innocent"...

BT :)
 
This story interests me on several levels. Of course it just screams more and more of the Victorian Nanny State that we have become, however I want to know what the timing is based on. . . .

Here is states banned for up to 12 hours, so realistically they are saying that if I did actually test positive, then I could drive in 12 hours and couldn't be detected then ??????

Under the current system, drivers' saliva is tested for cannabis, ecstasy or amphetamines at the roadside and banned for up to 12 hours if they return a positive result.

And why is it UP TO 12 hours? I thought it was like a pregnancy test this thing. it is either positive of negative? how can they judge this guy would be okay to drive in 4 hours?????

The new statistics emerged after it was revealed today that Geelong man Rory Lalor recently recorded a false positive test and was banned from the behind the wheel for four hours.


Oh and this!!!!

"I apologise for the inconvenience of these people, but I make no apologies for what we're doing," he said.

We won't apologise for having crap policing procedures that work on you being guilty until you can prove otherwise, it makes our lives a shit load easier, we can arrest all of you law breaking cunts and you can try and defend yourself later. But it's okay, most of you won't be able to afford decent lawyers to get off, so we will win every time, well that is until the DPP fuck it up for us again by telling us we suck at being coppers and actually following the law and the associated procedures . . . . . .
 
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how do such tests give false positives? Wouldn't there HAVE to be certain chemicals to give such results, also how did they find out later that some people were innocent of such crimes?

The tests are immunoassay based. The simplified explanation is that a gold labeled antibody elutes (travels) up a strip, and when bound to the drug, causes a colour change or band to appear. The followup lab test involves more accurate procedures (ELIZA, GC/MS etc). While the roadside tests are relatively specific, the antibodies will sometimes also bind with similarly structured compounds (causing what's known as false positives). Handling procedures are also important while administering and processing, as some trace metals and other substances may affect the result.
 
The tests are immunoassay based. The simplified explanation is that a gold labeled antibody elutes (travels) up a strip, and when bound to the drug, causes a colour change or band to appear. The followup lab test involves more accurate procedures (ELIZA, GC/MS etc). While the roadside tests are relatively specific, the antibodies will sometimes also bind with similarly structured compounds (causing what's known as false positives). Handling procedures are also important while administering and processing, as some trace metals and other substances may affect the result.

similarly structured compounds? E.g....?
 
Many of the methamphetamines will bind, and some cathinones and PEAs will probably too. Selegiline produces L-amphetamine and L-methamphetamine as metabolites, so unless the antibodies are isomer specific, then I'd expect selegiline could also cause a false positive.

I was contacted recently by an old friend stating he read positive after taking large doses of pseudoephedrine for a cold (He's a professional singer/musician). He claimed he hadn't taken any amphetamine/meth. He's now waiting for the followup analysis. After being advised by his lawyer, he went back to the pharmacy where he purchased the pseudo, and apparently, the pharmacist was willing to state verbally that pseudo can cause a false positive, but flatly refused to put anything in writing. The company that makes drug wipe claims pseudoephedrine doesn't cause false positives, so I'm keen to see the results of my friend's lab analysis.
 
yeah this is a fuckn legal rort.

Honestly, if we can't have testing in the accuracy range of an alcohol breatho, we shouldn't be using it at all. For every poor sod who's not driving on drugs - some cunt fucked to the eyeballs on heroin is driving into parked cars, then taking off without being noticed (i'm using my own drug driving in the past) and getting away with it - not only because no one saw him, but because opioids don't hit the testing radar since they're in fucking pretty much everything, and something as simple as a poppy seed could set of a false positive.

Grande System.
 
i hope one of those %'s is you and your life is ruined because of it.

QFT....95% is both unnacceptable, and not believable. maybe 5% return false positives, but how many false negatives are out there that are virtually impossible to pick up on?

my dealer smoked 3 grams in a sitting, only drank a mother the entire day, had a bong straight before jumping in his car. no brushing teeth or anything. gets tested 20 minutes down the road and he nearly lept out of his skin when the coppa came back and said "all right sir you're good to go."

'really? fuck are you serious i thought i was screwed....." wud've been funny if he actually said it haha.
 
i hope one of those %'s is you and your life is ruined because of it.

Yeah I'm pretty sure my life is going to be ruined because I can't drive for 4 hours. If you propose to eradicate the entire system because of this minor set back, then don't blame me when someone who is high as a kite T-bones you after driving through a booze bus.
 
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