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Unfortunately, there is actually no limit for how long an employer can suspend an employee, nor is there any requirement that they communicate the reason for the suspension or its expected duration. This freedom stems from the fact that employment in the state of Oklahoma is "at will" absent an express agreement to the contrary. At will employment can be terminated for any reason not amounting to discrimination on the basis of a legally protected trait (race, religion, gender, etc.) or retaliation for engaging in certain forms of legally protected conduct (filing a wage claim, taking FMLA leave, etc.). It doesn't matter whether the basis for termination is fair, reasonable or even true.
So, since an employee could simply be terminated altogether with no reason or cause, the law imposes no great restrictions on lesser forms of discipline, such as suspensions. Regrettably, all you can do is continue waiting it out and continue politely inquiring as to the status of the suspension.
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