the co sponsor is a us citizen but is from the same counrty with the benefiacry and iwould like to knw if tht wouldnt just raise any red flg coz the petitioner has still not got anyone so the beneficiary has a family friend from ghana but is a us citizen and in the states now and would just like to knw if the officer would be ok at the interview with the co sponsor

As long as the co-sponsor is a US citizen, they couldn't care less where they came from. Their only concern is that the co-sponsor earns enough income to be a co-sponsor.

Good luck with the process.

Depending on the consulate they might inquire the relationship between the petitionary and co-sponsor, so it's not like a total strange which might raise a red flag of being a fake co-sponsor.