Alt ending.
This can be added
When the father and Bruno got home
To tell the wife that their search was in vain. She shows them the bike was returned.
When the thief took the bike he crashed it.
Then ran off injured
The guy who showed the Antonio how to put up the signs sees this. Repairs the bike brings it back to Antonio. But by then Antonio and Bruno has already left to look for the bike
Antonio is speechless seeing the bike
Antonio hugs and kisses maria. And glad he can resume his job the next day. This time he will install a lock on the bike.