It is ultimately the manager's, store manager's, meat specialist's, and the district supervisor's responsibility. The 1st didn't do his or her job, and neither did all the rest. The meat manager assigns code-dating as a responsibility to the head wrapper or wrapper-on-duty; he or she is out in front of the case the most and has to objectively 'cull the case' of all close and outdated product based on store and company guidelines.
Likewise, the cutter, first cutter and manager's jobs are to "inspect what you expect" and follow up and double check all code-dating. So, there can be several eyes looking within the department.
Consequently, the store manager is responsible to be spot-checking all cases for code-dating issues; meat, produce, dairy, deli, bakery, specialty and grocery departments. He or she must be up on notices of code-dating issues and in conjunction with vendors and reps, also. I lived in fear that someone, anyone, outside my department found an out-of-code product. That was my responsibility.
Then, when district specialists for each department visited the store, it was their responsibility to confer with the store manager on any problems found, as well and share in the accolades too, if any*. When their boss, the District Supervisor, came around, if he or she found any outdated products, he or she should be asking: "Who's Looking????" See how it escalates? And the higher up it goes, the more severe one single outdated package goes. I've gotten calls as a specialist to be at a store 6 am for code-dating issues, all the specialists check all departments and cull all cases; the store manager is usually replaced when that happens.
Ultimately, the final inspection is the health department inspection, weights and measures, or county wholesome foods departments; if they find outdated, leaking, rancid, off-condition or underweight products left out for sale, you get fined and your store's name gets in the paper. That's disaster!
So, for her to take it back and someone discover there's more outdated product is a pretty serious offense and should be dealt with harshly; write-up, warning or termination is in order.
*accolades, if any - In the retail grocery business, there is but one true statement: Every Day you wake up you automatically know you are wrong; all the rest of the day everyone else will tell you to what extent!