I know a home care worker who is being falsely accused of taking money from a elder lady but there is no evidence what can happen in this case ?

I am not sure what you mean by "no evidence".    I have heard people say "There's no evidence against me" when they confessed to the crime on video camera.  I have heard people say, "There's no evidence" when their fingerprint is on the gun.  It's important that this home care worker get a good criminal defense lawyer to discuss his or her issues.  If the State proves their case beyond a reasonable doubt to the court, then yes, jail is a possibility.  And before you say, "well, this home care worker is innocent, so no lawyer is needed," that is exactly wrong.  You need only look at the work innocence projects do to try their best to get people out of prison when there now exists compelling evidence of the prisoner's innocence.  Thousands of them.  Hope this helps.