Finally got it. i started a new save did all story missions including ricky sandoval, and no trophy. has i was loading the file again i noticed that it said 98% and i thought it was because i didn't do the silent spade missions and as i was doing the first one my game crashed. i opened the game again did that mission and the trophy unlocked. didn't do the second mission in the silent spade.
i don´t know why it unlocked there but i hope that this explanation on how it happened to me can help someone