Dave Mirra had a rough time finding purpose when his BMX career ended ... he tried filling the void by helping kids ... but it wasn't enough.
Friends of Dave tell us ... in the months before his suicide, he spent his time introducing kids in the Greenville, North Carolina area to extreme sports, such as speed cycling and biking.
Problem was ... the 41-year-old couldn't find anything in his life to even approximate the adrenaline rush he got from BMX. He knew working with kids was important, but the passion he felt while he competed just wasn't there, and it became a significant factor in his deep depression.
We're told Dave tried to convince himself working with kids could be as satisfying as BMX, and from time to time his outlook would brighten. In fact, we're told just hours before he fatally shot himself, he saw someone at lunch and talked about plans to bring a speed cycling track to Greenville.
The friend with whom we spoke said the recurring theme from Dave was that he felt lost.