Grounds for refusal of bail must be reasonably substantiated with cogent reasons supported by proper information, not mere bald assertions. The State must present a coherent and consistent position in bail proceedings, and cannot arbitrarily change its stance without properly placing the altered position before the court. Where the State's case is patently weak and rests on evidence that has been reasonably explained, and where accused persons are of fixed abode, gainfully employed, and show no propensity to interfere with witnesses, bail should be granted with appropriate conditions to ensure availability for trial. The constitutional presumption of innocence operates fully in favour of accused persons until guilt is proven at trial.