My son's motorcycle's back tire

[MaximumSpeed]

Several months ago, my son got the back tire replaced on his bike. About a month ago, it started leaking air. It appears to be around the spokes. He paid extra to have a tube put in it. Is there an easy way to find out if they actually put in a tube or not?

 

[JackSwagger]

Some times the mechanic do such things and we don't notice that, we should check with the parts when we go to have a repair for our bike, people want to make fool of us and gain benefits without giving us the good service.