Choose the difficult record first
Once a theory feels convincing, it is tempting to reread only the records that support it. Instead, identify the source that would be hardest for the theory to accommodate if read straightforwardly. This is not a demand to reject your idea. It is a way to discover whether the explanation is robust or survives only because an inconvenient detail has been left outside it.
Worked example: an alibi window
Your theory requires someone at a location before 18:00, while a reliable record appears to place them elsewhere until 18:10. Check identity, date and what the second record actually locates. If those are secure and the file supplies no compatible route or sequence, do not invent a clock fault merely to preserve the theory. The contradiction may require changing the person, time or mechanism you proposed.
Record what would change your mind
Write the condition under which you would revise the theory, then apply it consistently. If every unfavorable record receives a new unsupported exception, the explanation is becoming protected rather than tested. In Somatry, a useful final review should make the report more precise. Sometimes it strengthens your answer; sometimes it exposes the exact field that still rests on an assumption rather than on the case materials.