AP270 invoice detail?

To perform a reconciliation I need to find the employee detail that populated the invoice amount on the AP270. Any idea how i would get there?

Example - on the AP270 for Vendor #2611xx Invoice #500113030812513xxxx there is a payment amount of $54.00 to United Way. Where would i look to find the employee detail that populated that $54.00?
Or should i look within the Voucher #? Is so, where should i look for that?

Thanks,
Chris