DRIVING WHILE HIGH – WEBER/KARGBO/SREENIVASAN
ADRIAN ALVAREZ: Is it nice and snug?
HARI SREENIVASAN: Yeah.
This is very Amelia Earhart, old school.
I’m being fitted with a functional near infrared spectroscopy
device - or fnirs for short - at a lab at
Massachusetts General hospital.
JODI GILMAN, ASSISTANT PROFESSOR, HARVARD
MEDICAL SCHOOL: start from 100 and count backwards by seven.
HARI
SREENIVASAN:
Ninety three.
Jodi Gilman is an
assistant professor at Harvard Medical School and a researcher with the
hospital’s Center for Addiction Medicine.
HARI
SREENIVASAN: 79.
As I count backwards,
the nodes on my forehead detect the amount of oxygen in the blood, in my brain
- an indication of how hard parts of my brain are working. Each node is shown
on screen as colored squares.
HARI
SREENIVASAN: 23.
It’s harder than it
looks because I caught a very early morning flight.
Nine, two. Thank god
it's over.
But Gilman is not
running a study on sleep deprivation, she’s developing a way to determine when
drivers are high on marijuana. She’s demonstrating this brain imaging device on
me while I’m drug-free but in her study she’s looking at the brains of
volunteers before and after taking a dose of synthetic cannabis.
HARI
SREENIVASAN: How
do you get from here, to whether or not someone is impaired behind the wheel?
JODI
GILMAN: So the idea is that
your brain looks different when you're intoxicated. What we're looking for is a
neural signature of being high. So we're looking at the brain when you're not
high and the brain when you're high and trying to detect differences between
those two brain states.
HARI
SREENIVASAN:
Gilman’s research is very relevant for Massachusetts.
In November 2016, voters
approved a recreational marijuana ballot initiative, joining seven other states
in legalizing the drug. Brick and mortar dispensaries could open as soon as
this summer.
The coming influx of
legal weed has many in the state concerned that it will mean more people are
driving while high.
If an officer pulled me
over right now and suspected I was drunk, police could test for alcohol in my
system. But with THC, the psychoactive ingredient in marijuana, it can be in my
system for weeks, and figuring out whether I’m impaired because of it is really
difficult.
Gilman and her
co-investigator, Dr. Eden evins, have tested about 50
subjects so far, and found that their test can at least tell the difference
between the effects from THC versus a placebo.
DR.
A. EDEN EVINS, DIRECTOR, MASS GENERAL HOSPITAL CENTER FOR ADDICTION MEDICINE: This just shows that we have sensitivity, that
it passes the bar and we could go to the next step. We have to be able to
distinguish small doses that don't cause intoxication or impairment from a dose
that causes intoxication or impairment. So it's like being able to tell the
difference between a .01 of alcohol on a breathalyzer and a .08.
HARI
SREENIVASAN: The
hope is that the test will eventually be able to spit out a number that
quantifies the likelihood that a driver is impaired.
JODI
GILMAN: The biggest advantage of something like this is
that it would be objective. It wouldn't rely on somebody's subjective opinion.
It wouldn't rely on what the person thought of you what the person's
preconceived notions are. This would be a number.
POLICE
OFFICER: Keep your eyes open for
me.
HARI
SREENIVASAN: But
in the absence of new tools for detecting marijuana impairment, law enforcement
are using some of the same methods as they do to detect impairment from
alcohol. That means relying on the judgement of
individual officers.
POLICE
OFFICER: You see this with my
finger?
HARI
SREENIVASAN: On
Cape Cod, these two dozen police gathered for two days of advanced training on
spotting impaired drivers. The class refreshed their skills, including
how to administer the standard field sobriety test and gave officers more
information about drugs.
RICH
TROY: Effects of cannabis -
brief attention span.
HARI
SREENIVASAN: Rich
Troy is one of the instructors, he’s a sergeant in nearby Dennis, Massachusetts
and a former drug recognition expert. That’s, a national credential developed
in the 1970s to identify drug impaired drivers.
RICH
TROY: Everybody's different.
So just like drink some people can drink a lot of beer and some people have one
beer and they're falling over giggling. The same holds true for drugs.
HARI
SREENIVASAN: Law
enforcement officials in the state say there has to be more emphasis on
training, as access to marijuana dramatically increases in the state.
John Carmichael is the
police chief in Walpole, Massachusetts and a member of a state special
commission studying the issue of operating under the influence, or OUI
JOHN
CARMICHAEL, CHIEF OF POLICE, WALPOLE, MA: We've been dealing with the OUI marijuana
issue just like we did before legalization. The problem is here in
Massachusetts it's not very effective.
HARI
SREENIVASAN: Under
Massachusetts state law, there is no requirement that someone who is arrested
submit to an officer evaluation. Carmichael would like to see the legislature
change the law.
JOHN
CARMICHAEL: Make it mandatory that
if somebody is arrested on probable cause on a motor vehicle stop for OUI drugs
and they're transported back to the police station, that they've given implied
consent that they will take that test and if they refuse then they should lose
their driver's license just as if they refused a breath test.
HARI
SREENIVASAN: The
state commission will be providing recommendations on law changes by the end of
the year, but Carmichael wants to see more research on measuring impaired drivers .
JOHN
CARMICHAEL: They have to come up
with a good standard and something that's backed by the science. You know, I
just don't think we're there yet.
HARI
SREENIVASAN:
While researchers and lawmakers try to figure out how to measure the level of
impairment, the industry is ready to go. Here at Cannacon
Massachusetts there are booths for everything from seeds to certified public
accountants.
And at this industry
convention, marijuana impaired driving is not perceived as a big problem.
Deneb Dollinger runs a
company that puts on cannabis related events in Massachusetts.
HARI
SREENIVASAN: Is there a problem with people driving impaired?
DENEB
DOLLINGER: Honestly, I don't think there is a problem with
it.
HARI
SREENIVASAN: Darren Jalbert works
with a cannabis seed producer.
DARREN
JALBERT: There is no epidemic of
impaired driving, high driving. It's a push to recriminalize or re-prohibit
cannabis culture and activity and consumption.
HARI
SREENIVASAN: Chip Lennemann works
with a company that makes plant nutrients.
CHIP
LENNEMANN: I think there's a lot of people out there
driving around high, or smoking while they drive. Do I personally feel that
it's the same as someone driving around drunk? No. I feel people have more
control when they're stoned or high than when they're drunk.
MARILYN
HUESTIS, SENIOR FELLOW, THE LAMBERT CENTER FOR THE STUDY OF MEDICINAL CANNABIS
AND HEMP, THOMAS JEFFERSON UNIVERSITY: They have no understanding of the fact that
cannabis can be so impairing.
HARI
SREENIVASAN: Marilyn
Huestis is a researcher who studies the effects of cannabis at Thomas Jefferson
University in Philadelphia.
Huestis used a driving
simulator, giving participants a dose of THC and testing their driving skills.
She says cannabis affects motor control and the ability to make decisions.
MARILYN
HUESTIS: They may be able to
drive home from work. But for instance the person who slams on the brakes in
front of them or someone comes out of the roadside on a bicycle into their
lane, all of those things are affected by cannabis and their ability to respond
accurately and correctly.
HARI
SREENIVASAN: Because
it’s so difficult to confirm that marijuana is the cause of any one crash, data
on traffic crashes and marijuana varies.
But in studies looking
at research from all over the world, the risk of crashes doubles when the
driver is under the influence of marijuana.
Huestis believes there
is risk to public safety and says impairment can be detected by trained cops.
MARILYN
HUESTIS: The best thing is to
first have a documentation of the impairment by the officer and then
once you have the impairment, now you need a biological sample that will tell
you which are the drugs that may be contributing to that impairment.
HARI
SREENIVASAN: There
are devices used at roadside stops that test saliva for the presence of THC,
and other drugs. They provide results in a few minutes with a quick mouth swab,
but only show the presence of THC, not necessarily impairment.
A California company
called Hound Labs is developing a marijuana breathalyzer that detects whether a
user smoked or consumed cannabis in the past few hours. But it’s still being
tested and is not yet available.
MATT
ALLEN, FIELD DIRECTOR, ACLU OF MASSACHUSETTS: We can't base policy on innovations that are
yet to happen.
HARI
SREENIVASAN: Matt
Allen is the Field Director for the ACLU of Massachusetts and also serves on
the state commission looking at driving while high.
MATT
ALLEN: I think that it's understandable that law
enforcement agencies are seeking the silver bullet that's similar to a
breathalyzer because it establishes beyond a reasonable doubt proof of
impairment in court. So it's expedient. At the same time at the ACLU we can't
let expediency in court trump science, evidence, and civil liberties.
HARI
SREENIVASAN: Allen
is concerned that some in Massachusetts might want to institute a hard limit on
the amount of THC in drivers. Since THC can linger in the body for weeks, it’s
not a reliable proxy for whether a driver is impaired.
MATT
ALLEN: We want to make sure
that any recommendations that come out of the operating on the influence
commission really are based in science and not this idea that impairment can be
established by blood tests.
JODI
GILMAN: So what did that feel?
HARI
SREENIVASAN:
Alright!
Back at Massachusetts
General Jodi Gilman and Dr. Eden Evins are expanding
their research. Last month, they received a 1.5 million dollar grant from the
National Institute on Drug Abuse.
HARI
SREENIVASAN: So
someday in the future you could get pulled over and the state trooper walks
over, has you put this baseball cap on. They don't need to be able to interpret
scans, right?
JODI GILMAN:No. No not at all. So the idea would be to make this dummy proof to make this as easy
to use as possible so it doesn't require any specialized training.
HARI SREENIVASAN: They hope to have a prototype of their brain
imaging device being tested on the roads by next spring.
###
|
TIMECODE |
LOWER
THIRD |
1 |
1:53 |
WATERTOWN, MA HARI SREENIVASAN @HARI |
2 |
2:53 |
JODI GILMAN MASS GENERAL CENTER FOR ADDICTION MEDICINE |
3 |
4:36 |
JOHN CARMICHAEL POLICE CHIEF, WALPOLE, MA |
4 |
5:08 |
BOSTON, MA HARI SREENIVASAN @HARI |
5 |
6:36 |
MARILYN HUESTIS LAMBERT CENTER, THOMAS JEFFERSON UNIV. |
6 |
7:36 |
COURTESY ABBOTT LABS |
7 |
7:47 |
COURTESY HOUND LABS |
8 |
8:24 |
MATT ALLEN ACLU MASSACHUSETTS |