Here is an excerpt:
“Non-bailable warrant should be issued to bring a person to court when summons of bailable warrants would be unlikely to have the desired result. This could be when:
- it is reasonable to believe that the person will not voluntarily appear in court; or
- the police authorities are unable to find the person to serve him with a summon;
- it is considered that the person could harm someone if not placed into custody immediately.
As far as possible, if the court is of the opinion that a summon will suffice in getting the appearance of the accused in the court, the summon or the bailable warrants should be preferred. The warrants either bailable or non-bailable should never be issued without proper scrutiny of facts and complete application of mind, due to the extremely serious consequences and ramifications which ensue on issuance of warrants. The court must very carefully examine whether the Criminal Complaint or FIR has not been filed with an oblique motive.
In complaint cases, at the first instance, the court should direct serving of the summons along with”
Here is the pdf of the judgment: SC Answers The Question Of When NBWs Should Be Issued-2007