holding that a gap of one year and three months between firing one employee and hiring another "would not permit a reasonable jury to infer any suspicion of pretext or that [the new employee] was hired" as a replacement

interpreting Federal Rule of Criminal Procedure 7 [e], which has nearly identical language to K.S.A. 22–3201 [e]: “Unless an additional or different offense is charged or a substantial right of the defendant is prejudiced, the court may permit an information to be amended at any time before the verdict or finding”