Automatic Speaker Recognition (ASR) is an economic tool for voice biometrics because of availability of low cost and powerful processors. For an ASR system to be successful in practical environments, it must have high mimic resistance, i.e., the system should not be defeated by determined mimics which may be either identical twins or professional mimics. In this paper, we demonstrate the effectiveness of Linear Prediction (LP) based features viz. Linear Prediction Coefficients (LPC) and Linear Prediction Cepstral Coefficients (LPCC) over filterbank based features such as Mel-Frequency Cepstral Coefficients (MFCC) and newly proposed Teager energy based MFCC (T-MFCC) for the identification of professional mimics in Marathi and Hindi languages.