A statement previously made cannot be justified or proved

Without witnesses, your alibi doesn't have a leg to stand on

Senza testimoni, il tuo alibi non regge

You'd better come up with another excuse, this one is very shaky and nobody will ever believe it

Inventa un'altra scusa, questa non sta in piedi e non ci crede nessuno

The defense attorneys are building their case on extremely shaky premises, as well as conclusions

Gli avvocati stanno costruendo la difesa su premesse e conclusioni che non reggono assolutamente

I empathize with you, but I have to rule against you because, legally, you don't have a leg to stand on

Sono solidale con te, ma non posso darti ragione, dato che, legalmente, la tua richiesta non ha nessun fondamento