The 'As Long As You Love Me' hitmaker's manager feared the worst during Bieber's troubled period three years ago - when he was caught in a series of controversial antics including a DUI arrest, video footage of him urinating in a bucket and alleged drug use - and admits it was a very ''scary'' time for everyone.
He said: ''To me, the only point I had where it was, 'Is it over?' wasn't a scary career over. I thought I was going to lose him. I thought he was going to die, you know?
''That was the scariest point, because he was an adult, so he could go away from me. I couldn't force him to stay next to me. There were points where I didn't know if in the morning he was going to be there, and I was petrified.''
However, Braun has no plans to go into detail about what happened as he feels it is a story that Bieber should tell himself but he doesn't think Bieber remembers much of it anyway.
Speaking on Complex's Blueprint programme, he added: ''I think that's his story to tell, and I think at the right time he'll tell the complete story. think - funny enough - his perspective and maybe some of who were there are [at the time] going to be very different, because a lot of it, he doesn't remember.''
It comes after Braun admitted Bieber's breakdown in 2014 was ''worse than people realised''.
He said: ''It was worse than people realised. I failed him day after day. We were living in hell because he was in such a dark place ... Some of the biggest people in the industry, people invested in Justin's career, told me, 'It's over. Focus on something else. That kid is done.' I made a promise to him when he was 13 that I would never give up on him. I plan on keeping that promise.''
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