Mr Karpela, a graduate of the Finland’s Police University College, has a 20-year career in the National Police of Finland where he worked as a unit supervisor and subject matter expert.

Mr. Karpela is a graduate of U.S. Secret Service Threat Management Program, Gavin De Becker threat management academy and he has done numerous other professional training programs with the FBI Behavioral Analysis Unit. Before joining the National police of Finland, Mr. Karpela served in the Military Police SRT-team. 

Mr. Karpela has also authored three books on police operations with organized crime (1995), personal security (1998) and case management guide for stalking cases (2001). He has also authored a chapter on the use of social psychology in counter terrorism operations (2017). In 2022 his book a management of vexatious complainants comes out.