If u know who took it... why can't u just tell the police you suspect this guy and search his place?
Yeah maybe he hid the bikes and parts somewhere else , but there's GOTTA be some way u can get proof or a confession outta him?
- Also, hey at least you think u know who stole it.... coz in most cases of bikes being stolen , the owner has no idea who stole it..
GOOD LUCK BRO!