What are you doing here?
I want to talk to duane.
No, no, no.
I want to talk to duane.
[ g*nsh*t ]
Narrator: when steven harper
Opened fire on the johnson
Family in 1975, he was consumed
With both jealousy and rage over
Sandy johnson's rejection.
With harper in prison for the
sh**ting, his bizarre behavior
Continued.
He mailed these pictures
Depicting sandy as a witch to
Her home.
Initially, sandy johnson
Couldn't believe that her old
Boyfriend was capable of m*rder,
Which explains why she didn't
Identify him as a possible
Suspect.
Their unusual relationship was
The focus of tomas guillen's
Book "toxic love."
She had painted the former
Boyfriend, steven harper, as a
Very peaceful person, as a very
Loving person, as a very good
Boyfriend.
He was not "prone to v*olence."
That sort of portrayal.
Very puzzling, very perplexing.
Why would she do that?
I don't know.
Narrator: after prison,
Harper took a job at the eppley
Cancer institute.
Published reports say it was
Here where harper first learned
About the deadly d.m.n.
A newspaper article had been
Posted on the company's bulletin
Board, describing how a german
Chemist k*lled his wife by
Putting d.m.n. In her marmalade.
Authorities believe that harper
Confiscated d.m.n. From a locked
Refrigerator in the lab and
Experimented at home to find the
Correct dosage.
Harper confided to a friend that
He broke into sandy and duane's
Home on a thursday night when no
One was there.
He poured the d.m.n. In a
Pitcher of lemonade he found in
The refrigerator.
The following sunday afternoon,
The johnsons, sheltons, and the
Grandparents all gathered for
What would be their last family
Get-together.
Duane had been painting outside
And had two large glasses of the
Lemonade to quench his thirst.
Lemonade in his cup.
Sandy's parents did not drink
The lemonade and were drinking
Coffee instead.
Ironically, the presumed target
Of the sabotage, sandy johnson,
Didn't like lemonade and drank
Something else.
Duane d*ed because he ingested
Two full glasses of lemonade,
More than the others.
Chad was simply too small for
His system to handle the toxin.
Steven harper was convicted of
Two counts of first-degree
m*rder and three counts of
Poisoning with intent to k*ll.
He was sentenced to death in the
Electric chair.
But, before that could happen,
Harper committed su1c1de in his
Cell.
The saddest story that you
Could ever think of.
It was sad enough that a child
Dies, that people get poisoned,
That you have this plot of
m*rder by cancer.
But you have living victims.
And his plot to k*ll with cancer
May still come to pass.
Narrator: sherry johnson was
Two years old when she ingested
The d.m.n.
Although a blood transfusion
Saved her life, she suffers
Chronic liver problems to this
Day.
Bruce shelton was so distraught
Over the m*rder of his son,
Chad, and consumed by the fear
That he would develop cancer
That he lost his job, descended
Into a life of alcoholism, and
d*ed, homeless, at the age of
He was buried beside the infant
Son he mourned.
His wife, sally, remarried and
Reportedly refused to have more
Children, for fear she would
Develop cancer and not be alive
To raise them.
That was the most ingenious
Way to commit the perfect crime,
To commit the perfect m*rder --
Give somebody something that
Nobody will suspect, where they
Die years later of cancer.
And you can't detect it.
Narrator: and without
Scientific evidence, the case
Against steven harper might
Never have been proven.
I have spent my whole career
Trying to find out how chemicals
Cause cancer and tried to
Prevent that process.
And it bothers me that there
Would be people out there who
Would take a chemical like that
And use it to try to cause
Cancer.
It's a very sick thing.
03x01 - Without a Trace
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Documentary that reveals how forensic science is used to solve violent crimes, mysterious accidents, and outbreaks of illness.
Documentary that reveals how forensic science is used to solve violent crimes, mysterious accidents, and outbreaks of illness.