gangs taking over

i'm a bit depressed today because i've spent weeks preparing for a jury trial set for next week that just fell apart. the offense involved soliciting a child into a gang. however, when i met with the victim and his parents yesterday, he completely recanted his story and said it was simply a fight. he looked scared, but the bottom line is that i honestly don't know which is the true story and i can't take a case like that to a jury. it's so frustrating because i believe his first story is true and that he is now too scared to stick to it. it's even more frustrating that kids actually have to face these kinds of challenges. the victim in this case is only 12 years old.