Leaving the wallet, cash and wedding ring could suggest planning. Especially with the curious Thursday trip to the Paine house, the curious curtain rod excuse and the disappearance of the rifle from the garage.
The non-responsiveness to Whaley could suggest consciousness of guilt (the evidentiary legal term). It might or might not be admissible and would carry no great weight if it were admitted. Leaving the TSBD, getting the gun, shooting Tippit, fleeing to the theater, resisting arrest, yada yada, all make the non-responsiveness to Whaley pale in comparison.
As DVP suggests, it's the context that's important.