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True Crime Vault: Undercover Girlfriend

16 Jun 2026

Transcription

Transcript generated automatically by AI and may contain errors.

Chapter 1: What happened to the five women who went missing?

0.638 - 21.816 Deborah Roberts

On a quiet Saturday morning, five women walked into a Lane Bryant store and never came home. The man responsible for their deaths was heard and even described by the lone survivor. But despite nearly being caught, he vanished into thin air. In the years since, new technology, new investigators, and new questions have changed what's possible. But the families are still waiting for answers.

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22.116 - 30.223 Deborah Roberts

The evidence is still there. And this case isn't cold. It's unfinished. Listen to CounterClock Season 8 wherever you get your podcasts.

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32.498 - 37.426

Step into the 2020 True Crime Vault where you'll hear our most gripping stories.

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41.994 - 60.015 Brent Christensen

We have this missing international student. How did this young visiting scholar just disappear? And all you could do is think, as a parent, my child is halfway around the world. Nobody knows where they are.

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Chapter 2: How did technology change the investigation of Yingying Zhang's case?

60.796 - 67.369 Dan Ivascyn

We have about 2,000 cameras. And she got off the bus right here at this location, this spot right here.

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67.389 - 76.647

It was a pretty eerie video to watch. As soon as the car drives up, basically, and stops right by Ying Ying, I'm just thinking, don't get in the car, don't get in the car.

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77.065 - 79.408 Brent Christensen

OK, we're dealing with a kidnapping here.

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79.428 - 83.772

That there was someone out there posing as an undercover cop trying to get people into vehicles.

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84.113 - 90.74 Brent Christensen

Certainly didn't fit the profile of a kidnapper. Did you see this? Can you believe this? Look at who the kidnapper was. Oh, my god.

91.401 - 97.107 Dan Ivascyn

Look, you know that we didn't bring you all the way up here to talk about video games.

97.127 - 106.617 Brent Christensen

I needed to know where she was, like, now. And to find out, to trap him, they're having his girlfriend wear a wire, maybe even risking her life.

107.204 - 110.248

I'm turning this thing on. It's about 1240.

110.428 - 131.716 Brent Christensen

They want her to go undercover. The girlfriend is scared to death. I want to tell you. We see that he was on a group chat entitled Abduction 101. It was a fetish, a fantasy. It was clear this was something he wanted to do. She started really freaking out.

Chapter 3: What led to the undercover operation involving the suspect's girlfriend?

452.45 - 469.851 Brent Christensen

We have had missing students in the past, but they're very rare that they're actually, that we don't find them immediately. And then some of her colleagues that are also grad students came in and would literally sit in our front office. Do you think they were just feeling you were not doing enough?

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469.831 - 478.906 Brent Christensen

I think they were just so concerned for welfare and they had a sense of urgency about it that she needed help and that none of this made sense.

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480.068 - 491.367 Paul Cohen

That night then we just stayed in front of the apartment building. We stayed maybe until midnight. Still we really didn't have any clue.

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497 - 519.514 Brent Christensen

The News Gazette, this is Mary. The next day, Saturday, June the 10th, I was working here in the newsroom, and the phone rang, and it was a male friend of Ying Ying's. And he told me, we have this missing international student. And I have to admit, I kind of rolled my eyes. As a crime reporter, we get missing persons reports quite a bit.

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519.494 - 531.811 Brent Christensen

There was something about the way these people were conveying, we think something's wrong, that made me say, okay, it won't hurt if we run a short story saying that the police are looking for her.

531.992 - 538.701

There was a determination to find her. There's that determination from campus and from law enforcement.

538.799 - 562.883 Brent Christensen

Our officers initially went there. Her apartment was in normal condition, so she didn't pack up her clothes, and she didn't have a car, so I assumed that she took a bus. So I basically checked with MTD buses in town here to see if she had got on a bus. That's when they started looking at the cameras, the buses, and to try to figure out her last movements.

563.892 - 591.148 Brent Christensen

about 2,000 cameras, so that changed everything. There's probably 10 cameras on this bus. One there, there, here. They're shooting every angle. Yeah. And then they discover that an exterior camera on the outside of the bus captures Yingying boarding a city bus at about 1.30 p.m. right in front of her apartment. Inside cameras show her walking toward the back, taking a seat.

592.141 - 595.648 Dan Ivascyn

So she was captured on video from the bus that dropped her off.

Chapter 4: Who was Yingying Zhang and what was her background?

943.277 - 945.962 Deborah Roberts

Because of the sunglasses, it would be tough.

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947.427 - 966.67 Brent Christensen

Emily Hogan is so rattled that she posts about the encounter on Facebook. This is hours before Yingying's kidnapping. She warns people, don't get in a car, even if they say they are police or have a badge. If Yingying had just seen that post, perhaps she might never have gotten picked up.

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967.611 - 973.198 Paul Cohen

It was just scary to know that somebody was out there just driving around wanting to pick up women.

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974.444 - 992.544

Across the ocean in China, that video of Ying Ying getting into that black Saturn is seen on Chinese media.

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993.165 - 1007.347 Brent Christensen

One of the people watching that was someone very, very close to Ying Ying, her serious boyfriend, Xiaoding Hou. I saw the videos. I don't know what happened after she got into the car.

1007.687 - 1021.596

And I also have some bad feelings. What, days went by, nothing happened? Yeah, nothing happened. And we decided to go to the United States and to look for her by ourselves.

1024.664 - 1036.641 Brent Christensen

Yingying's boyfriend and her family wanted to do something that the FBI could not do, just find out for themselves exactly what happened to her.

1036.661 - 1049.659

They saw a girl in a small town. An Asian girl who just looked like Yingying. So you rushed right down? Oh, yeah. We went there. They said the girl was her. Some of them even said definitely it's her.

1059.376 - 1063.803 Paul Cohen

Let's continue to pay attention to Chinese scholar Zhang Yingying's kidnapping case in the United States.

Chapter 5: What were the circumstances surrounding Yingying Zhang's disappearance?

1534.95 - 1558.896 Brent Christensen

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1558.876 - 1578.462 Brent Christensen

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1598.304 - 1618.858 Brent Christensen

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1619.098 - 1636.105 Brent Christensen

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1636.125 - 1655.271 Brent Christensen

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1655.552 - 1683.533 Brent Christensen

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1683.733 - 1690.523 Brent Christensen

Campus police say surveillance video shows her entering a black Saturn Astra vehicle in Urbana that afternoon.

1691.744 - 1700.457

Yingying has been missing for days. The police and FBI agents are working 20-hour days because they know that they're up against the clock.

Chapter 6: How did the investigation uncover the suspect Brent Christensen?

2503.407 - 2516.15 Brent Christensen

I mean, send your kid away to school, and then they never come back. Where'd you take her, Brent? We need to find Yang Yang. Tonight. Can you believe this?

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2516.19 - 2523.86

Can you believe this? Like, that's Brent. That's our TA. I'm just absolutely blown away. They ask Christensen's girlfriend to wear a wire for them.

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2523.88 - 2532.771 Brent Christensen

They want her to go undercover. That's fine. During the entire walk, Tara was recording everything that he was saying.

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2532.791 - 2543.996

13. The best person I would consider on my level to actually do that. Good luck. The girlfriend is scared to death.

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2544.057 - 2545.56 Brent Christensen

They want to find their daughter.

2547.845 - 2564.307

Please cut. She disappeared at the University of Illinois and still has not been found. No matter dead or alive, we just want to find her and bring her home.

2564.708 - 2584.758 Brent Christensen

Yingying Zheng was last seen on this campus video. Moving toward late June of 2017, this may have been the most frightening time for students, faculty, residents in Champaign-Urbana. You still had a missing young woman, and nobody knew who was behind this. There's this image of a black car that's been put out in the media.

2585.479 - 2608.098

People on campus are wondering, is there a kidnapper out there? Is he going to strike again? What the public doesn't know at this point is that authorities have tracked that vehicle to the owner, a U of I physics grad student named Brent Christensen. Initially, Christensen said he never left the apartment on June 9th, that he was sleeping and playing video games.

2610.201 - 2616.469

But in that interrogation, he admits that he picked someone up. And oh, by the way, that person he picked up

Chapter 7: What evidence linked Brent Christensen to Yingying Zhang's case?

3467.922 - 3479.723

Like, just think about that. Just think. I want to tell you, I do want to.

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3479.743 - 3487.837 Brent Christensen

In the middle of that visual is girlfriend with the FBI recording device. Suddenly, here's exactly what happened to Ying Ying Zhao.

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3488.618 - 3494.508 Paul Cohen

She was valued. She worked.

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3494.768 - 3540.112 Brent Christensen

She paid. I remember Getting home that night, I couldn't sleep. Close to midnight, my phone rings, and it's my supervisor, and he goes, Tara's here. We're listening to the recording, and Christensen admits on the recording that he killed Ying Ying. Tara was... very upset when she was with us at our office. On the day of the memorial walk, she was very frightened many times.

3540.172 - 3548.443 Brent Christensen

She was very scared many times. Crying, just shaking. I mean, this really impacted her, the things that were said to her.

3549.504 - 3556.153

They will never find her. The family, you know, they're going to leave her behind because no one will ever know where she is.

3557.348 - 3573.885 Brent Christensen

With those admissions, we believe that we had enough evidence to now arrest him for kidnapping. We start tonight with breaking news. The FBI within the hour announcing charges against a man accused of kidnapping. News of the charges shocking to those who knew Christensen.

3574.345 - 3582.073

Finding out Brent Christensen was a student made the situation a little more scary. He was going to class here, he was going to work here.

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