Residency requirements for Colombia

Hello,
I have a friend who is considering a move to Colombia, but isn't sure if he would be able to attain legal residency because he has a felony on his record for domestic violence. I told him I would look into it for him, but haven't been able to find out if there are any restrictions. I know he wouldn't be allowed in Ecuador as a resident. Does anyone know the answer to this question?
Thanks for your help in advance!

Your friend may have to consider some other questions, as well....

1.  Can he get a passport?  Not all felons will qualify for a U.S. passport.  Source:  www.fastportpassport.com

2.  Presuming that he is of working age, will he be able to get a job in a Spanish-language country that has the violent history associated with Colombia in recent decades, especially given that his crime was violent?

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Although Colombian cities are more peaceful these days, the country is a bit on edge with the FARC peace-treaty plebiscite coming up October 2nd and probably a national transitional period to follow.

cccmedia from Medellín