How can I research public records to find out if someone committed a felony? ?

I'm not the one with the felony charge. I'm trying to do a background check, and the felony was committed in 1991. So, how long would that felony record be prominent on someone's criminal record online? How can I research public records to find out if someone committed a felony? ?
Public records stay public permanently, for free, I would recommend searching public records; http://www.crimcheck.com has an extensive public records database that you can search for free. Good luck!
What purpose do you need it for? You can't go though records about if someone has committed a felony crime unless if they apply for work and needs a background check thats the only way. How can I research public records to find out if someone committed a felony? ?
You will need to know His Name SS number address at the time and where it was committed Go to the court house to check And It being a Felony It a permanent mark on your record.How can I research public records to find out if someone committed a felony? ?
You can look that stuff up online,at GovCourtRecords.Com.Its does cost like 30 dollars for registration however.