Who broke the apartment window?

Riddles and puzzles are great exercises for your brain.  Research shows that constant brain exercise can even help prevent Alzheimer ’s disease.  If you have a minute, try to figure this one out and post your explanation as a comment.  I’ll post the answer sometime next week.  Let’s see who the real brainiacs of Westmont at Chesterfield are! =)

Ronny, Bobby, Ricky, Mike, and Ralph are brothers. One day, one of them broke an apartment window. When their father asked them who did it, they gave the following answers:
Ronny: “It was Bobby or Ricky.”
Bobby: “It was neither Mike nor me.”
Ricky: “Both of you are lying.”
Ralph: “No, only one of them is lying.”
Mike: “No, Ralph, you are wrong.”
Then their mother added: “Three of my sons are telling the truth, but I do not believe what the two others said.”

Who broke the window?