C23 Finally i found the evidence

When I woke up the next morning, my head was still aching a little. I think it was from yesterday's drinking. I picked up the clothes on the floor and threw them into the washing machine.

I carried the lockbox over to the table. How do I open it? I took out a hammer and pincers from the toolbox, intending to smash open the safe. But no matter how hard I used it