MrBallen has become a true-crime fixture, with four podcasts and millions of followers on social media. Here's how its creator built the business.

(Bloomberg) -- Americans’ appetite for true-crime stories shows no sign of flagging. Exhibit A: the recent career trajectory of John B. Allen, better known to his ravenous, online fans as MrBallen.

In the crowded true-crime media space, MrBallen has kept his approach pretty simple. He appears on his YouTube channel wearing a flannel shirt and backwards baseball cap in every video, speaking ...

Former US Navy SEAL from Quincy turns true crime stories into gold with MrBallen With an enormous following for his ‘strange, dark, and mysterious stories’ that led to a major Amazon deal, the ...