you mean "prima facie" not "prima facia." Prima facia doesn't mean anything, except maybe the first row of soffit under your roof eaves.
If you shot me, and a cop saw you standing over my body holding a smoking gun, he'd arrest you on the assumption that you shot me, but your guilt would be determined through our (adversarial) court system. The cop is not entitled to shoot you because he thinks you shot me (but he could if he felt threatened). Does that work? I'm not a law professor.