I wouldn't call the detective back. If the matter was closed the first time and a detective wants additional information, then the odds are good that they didn't believe all you said the first time.
When you are a potential suspect, you should never talk to the police without a lawyer. That's a fundamental right you have under the 5th Amendment -- to refrain from self-incrimination. Anything you say to police, even when you think it will be helpful to your cause can be turned on your head and used against you.
If the police have enough to arrest you, let them come get you without helping them build a stronger case. If the police don't have enough to arrest you, that's all the more reason not to call them back and talk, because you could end up giving them the one tidbit they need to have probable cause to take you in.
You should talk to your lawyer before calling them back at all. If he is an experienced criminal lawyer, he's going to tell you to keep your mouth shut and not to talk to the police, because there is nothing that you can safely say, since you don't know what they are looking to hear. If they call you and you pick up the phone just tell them that you are waiting to hear from your lawyer have nothing further to say about this incident at this time.
As you don't appear to know who's targeting you, there isn't much you can do about this right now. But if you are arrested and charged, you will learn the name of the complainant and what you're alleged to have done. If you win the case, then you potentially could sue him for malicious prosecution
, or report him to the prosecutor and try to get him charged with filing a false report.