By JIM STALNAhKK SUN Staff WriterSix nit* ml ter* of the “best casino cheating gang in the country” have been arrested by sheriff’s detectives for bilking Strip hotels out of an estimated $200,000! in the past two months—SIWUMM) from one resort alone.Deadline Past For Filing Tax Returns(See Photo Page It)Did you remember to file your l%i income tax return?If the answer is “No,” you're just a little late. The deadline for filing the *61 return was last night. And now t ncle Sam probably will charge you a little extra for that late return.. Deputies arrested tne six■ mole and female members of I the alleged gang at a fashionable Strip apartment aftermore than a month of brilliant sleuthing by detectives Jerry Brown and Bob Downing.A large number of fixed dice, paraphernalia for fixing ^krts, narcotics and a gun were found in the suspects' possession when they werearrested.Brown told the SUN that the Cowboy Pearce gang travels from state to state specializing in cheating both (legal—only in Nevada—andillegal gambling games by(Conlinued on Page 14) j