When I search on the BOP offender locator, it shows my friend in one prison but on here it shows another, why would that be?

This discrepancy is likely due to a transfer. When an inmate is transferred between federal prisons, the Bureau of Prisons (BOP) offender locator may temporarily show the original facility until the transfer is fully processed and the inmate arrives at the new location. Transfers can occur for several reasons, including changes in custody level, participation in specific programs, or administrative needs. If you give us the inmate's name we can update it for you so that you may use the services on the website