Ryan Knudson

Seems nothing can hold back the bulls on Wall Street.

U.S.

markets setting record after record high.

There's a church in Nashville, Tennessee that's been around for generations.

It's a five-story red brick building that was once a pillar of the community.

That's my colleague Cam McWhorter.

Cam says that like many churches around the country, eventually the congregation shrank and got older.

Then, one Sunday in 2017, a man named Sean Mathis showed up.

He came for a service there with his wife.

Mathis was in his 40s, much younger than the average member.

And the congregation, which was desperate for newcomers, welcomed them with open arms.

Mathis said he wanted to get involved and started sharing his thoughts about how the church could grow.

What were some of his ideas?

Here's Mathis giving a lecture in 2019.

Mathis was quickly elevated to leadership.

And before long, he effectively took control of the church.

But for some congregants, things did not go the way they had imagined.

An attorney who represents the church said his client committed no wrongdoing.

Mathis declined our request for an interview.

Mathis' arrival kicked off a multi-year legal battle over the church's fate.