Conviction of accused must rest, not on weakness of defense, but on strength of prosecution

Dear PAO,

My cousin filed a criminal case, which was heard in court but was eventually dismissed. My cousin said that the assailant only presented one witness, while he had several witnesses who testified for him, and he submitted a good number of evidence. So, we really could not understand why or how the case was dismissed. According to a paralegal officer my cousin spoke with, the evidence that my cousin submitted was not enough to prove the guilt of his assailant as there were inconsistencies in the evidence and testimonies of his witnesses. Can this really happen?