It's a scam. Some guy called saying he was a family member visiting from Mexico. He said he was at the Chicago airport and wanted us to pick him up. Later he called saying he ran into a problem and was probably going to ask for money. My mom asked for his name and he finally hung up.

Es un engano. Le dicen que es un familiar que viene de mexico y nada mas quieren sacarle dinero a la gente. No les den informacion.

siguen llamndo para  de la misma manera  llamaron a indiana y quisieron hacer lo mismo que cometa la persona que los denuncia primero

Called my parents and said they were coming in for 10 days. The man said he was "family" and would need to be picked up from the Detroit airport but would call back later when he got there. So far he has not called back but same story. Clearly of a Latino background as my parents are.

This is a type of "grandparent scam"
See:
http://travel.state.gov/travel/cis_pa_tw/fina ... scams_5608.html

Report is to:
http://www.ic3.gov/default.aspx
http://www.fbi.gov/
http://www.nw3c.org/
and your local authorities.