Was the Reddit post itself seen by authorities or just the poster actually reaching out to share the tip making the impact (and what a tip). Where on reddit does all this happen, a Brown subreddit?
>> A day after the Reddit post was made, the writer approached law enforcement officials and told them about his encounter
The article seems to imply it was the him reaching out after comments on the reddit post urged him to contact them; in which he in turn gave them more information than what was in the post.