Can cops search for someone using an alias?

Question

I want to know if local law enforcement can search for someone in a database using a alias name instead of there real name.  Can that be done?  What database is that called?

Update:

To the first answerer.  What does UCR stand for?

Answer 1

Yes, of course.  Their, there, they're.

Answer 2

Police have access to the National Crime Information Center (NCIC) and the National Law Enforcement Telecommunications System (NLETS). Both of those, along with state databases, collect alias information. 

Uniform Crime Reporting simply collects data on crimes, not on suspects. It is available to anyone, not just law enforcement. 

https://www.fbi.gov/services/cjis/ucr

Answer 3

of course it can be done.  police databases regularly collect such names and remember them forever

Answer 4

They sure can. The Uniform Crime Reporting (UCR) program compiles official data on crime in the United States, published by the Federal Bureau of Investigation (FBI). All local police can access that database.

Answer 5

Sure all that is in the UCR