Science Vs: How a Nuclear Lab Helped Catch a Serial Killer

Science Vs, hosted by Wendy Zuckerman and produced by Spotify Studios, delves into the intersection of science and real-world issues. In the gripping episode titled "How a Nuclear Lab Helped Catch a Serial Killer," released on November 28, 2024, the hosts explore the chilling case of Efren Saldivar, a respiratory therapist accused of murdering dozens of patients at Glendale Adventist Medical Center in California. This detailed summary captures the key points, discussions, insights, and conclusions from the episode, enhanced with notable quotes and timestamps.

1. Introducing the Mystery

The episode opens with Wendy Zuckerman introducing her co-host, Ashley Flowers from Crime Junkie, highlighting their shared background in biomedical science.

[00:01]
Wendy Zuckerman: "On the show, how a lab that designs nuclear weapons helped catch a serial killer."

[00:29]
Ashley Flowers: "I'm so excited to be here."

Their chemistry sets the stage for unraveling a true crime story intertwined with advanced forensic science.

2. The Spate of Suspicious Deaths

The narrative begins in late 1996 when several elderly patients at Glendale Adventist Medical Center die under seemingly natural circumstances. Initially dismissed as expected due to their chronic illnesses, the deaths of Salbi Asatrian, Eleanora Schlegel, and Jose Alfaro Sr. raise suspicions within the hospital staff.

[02:19]
Wendy Zuckerman: "It's two days after Christmas in 1996, and a woman named Salbi Asatrian is rushed to Glendale Adventist Medical Center..."

[03:14]
Ashley Flowers: "Oh, no."

[03:31]
Efren Saldivar emerges as the person of interest, with rumors suggesting he was purposefully injecting patients with harmful substances.

3. Efren Saldivar: From Biomedical Science to Crime

Efren's background is explored, revealing his oddball personality during high school and his eventual pivot from aspiring to be a doctor to focusing on research in respiratory therapy.

[06:24]
Ashley Flowers: "Hello."

[07:00]
Sarah Scholes (Science Journalist): "He worked at a grocery store. He played the oboe. He didn't have a ton of friends, but he was a pretty well liked kid and was kind of like the leader of the misfits."

Despite his likable demeanor, Efren's behavior at the hospital becomes increasingly questionable, leading to allegations of patient deaths being hastened by his actions.

[09:06]
Ashley Flowers: "Okay."

[09:07]
Wendy Zuckerman: "And so when Efren is just 19 years old, in 1989, he gets a job at Glendale Adventist Medical Center."

4. The Suspicions and Confession

A coworker notices Efren with suspicious drugs in his locker and reports him, but initial investigations find no higher mortality rates among his patients. However, in February 1998, under dubious circumstances and potential coercion, Efren confesses to murdering dozens of patients using drugs like Pavlon and succinylcholine.

[14:02]
Ashley Flowers: "Yeah, yeah, yeah, yeah, yeah, yeah. Gotcha, gotcha, gotcha, John."

[14:43]
John McKillop (Detective Sergeant): "I mean, they literally pulled me off the hockey rink to tell me, hey, your partner's on the phone. There's something going on."

Efren's confession, however, lacked physical evidence, invoking the legal principle of corpus delicti, which requires evidence beyond confession for a conviction.

5. The Quest for Physical Evidence

To secure a conviction, the authorities needed tangible proof of Efren's crimes. This is where the Lawrence Livermore National Laboratory (LLNL), known as the "Lab of Last Resort," steps in. The lab's forensic science center specializes in tracing minute chemical traces, making it pivotal in this case.

[24:53]
Wendy Zuckerman: "This lab is called the Lawrence Livermore National Laboratory... And why?"

[25:34]
John McKillop: "I don't know if you know about this place, but it's like, I mean, they weigh you when you go in to make sure your weight is consistent with what's on your ID and, you know, fingerprint you."

6. Overcoming Scientific Challenges

The main challenge was detecting Pavlon and succinylcholine in decomposed bodies years after death. Dr. Ian Musgrave explains the complexity of these drugs' breakdown and the absence of existing tests to identify them post-mortem.

[18:03]
Ashley Flowers: "Everything shuts down."

[19:27]
Ashley Flowers: "You can't convict someone just based on a confession."

LLNL scientists, including analytical chemist Armando Alcaraz, embark on developing a reliable test. They simulate the decomposition process using pig livers to create analogs for human tissues, dealing with overwhelming contamination from various sources like tobacco and embalming fluids.

[29:22]
Armando Alcaraz: "My God, are we going to find this stuff?"

7. Breakthrough at LLNL

After extensive experimentation, LLNL's team discovers a specific cartridge that effectively isolates Pavlon from the complex mixture of decomposed tissue chemicals. Utilizing mass spectrometry, they succeed in identifying Pavlon in exhumed bodies.

[36:54]
Ashley Flowers: "Wow."

[37:00]
Ashley Flowers: "Holy crap. That is incredible, isn't it?"

This breakthrough enabled the police to confirm Efren's involvement by matching the presence of Pavlon in the victims' systems.

8. Finalizing the Case

With the scientific evidence in hand, authorities exhume 20 highly suspicious cases to test for Pavlon. Although they couldn't test every patient, finding the drug in six individuals—including those initially suspected—strengthened the case against Efren.

[40:21]
John McKillop: "So finding the drug was a huge moment. We kind of erupted in clapping and, like, cheering type of thing."

Ultimately, Efren Saldivar was arrested again in January 2001, where he confessed to more crimes under pressure. Despite his initial claim of seeking the death penalty as a means to end his life, Efren was convicted for six murders and one attempted murder, receiving multiple life sentences.

[43:54]
John McKillop: "Well, I can kill 10 people per vial, and I probably had used 10 or 20 vials over the years. And so it was probably 100 to 200."

9. The Role of Science in Justice

The case of Efren Saldivar underscores the critical role of forensic science in the justice system. The collaboration between law enforcement and LLNL exemplifies how scientific advancements can bridge gaps in legal investigations, ensuring that evidence-based convictions uphold the integrity of the legal process.

[47:48]
Ashley Flowers: "I love it."

[48:10]
Wendy Zuckerman: "Science saved the day."

Conclusion

This episode of Science Vs masterfully illustrates the convergence of true crime and scientific innovation. Through meticulous investigation and pioneering forensic techniques, science not only unraveled a complex mystery but also delivered justice in a case that could have otherwise remained unresolved. The hosts highlight the importance of continuous scientific progress in addressing and solving intricate problems within society.

For more in-depth information about this case, listeners are encouraged to explore the episode's transcript and related resources linked in the show notes.

Notable Quotes:

• Wendy Zuckerman [00:01]: "How a lab that designs nuclear weapons helped catch a serial killer."

• John McKillop [15:30]: "They would have definitely felt it."

• Armando Alcaraz [29:22]: "My God, are we going to find this stuff?"

• Ashley Flowers [41:07]: "Wow."

• Wendy Zuckerman [47:48]: "Science saved the day."

References:

• Book Mentioned: Countdown: The Blinding Future of Nuclear Weapons by Sarah Scholes.
• Key Individuals:
  • Efren Saldivar: Respiratory therapist and convicted serial killer.
  • John McKillop: Detective Sergeant with Glendale Police Department.
  • Armando Alcaraz: Analytical Chemist at Lawrence Livermore National Laboratory.
  • Sarah Scholes: Science Journalist.

Produced by: Katie Foster Keys and Joel Werner
Edited by: Blythe Terrell
Mix and Sound Design: Sam Baer
Fact Checking: Diane Kelly
Music: Wiley, Bobby Lord, and Bumi Hidaka
Special Thanks: Roland Campos, Steve Wampler, Audrey Williams, and others.

For more episodes of Science Vs, listen on Spotify or your preferred podcast platform.