Salt Lake City Police Chief Chris Burbank says his department's homicide detectives and FBI agents have been building a profile of Sulejman Talovic, attempting to trace experiences and other factors that may have influenced him before his murderous Feb. 12 attack at Trolley Square.

Possible factors:

— He was a loner.

— His childhood in war-torn Bosnia.

— Being a refugee and immigrant to the U.S.

— Trying to fit into a new culture

— The language barrier.

Probable non-factors:

— Little access to computers and the Internet.

— No video game system at home.

— No gang links.

— No known terrorism ties.

Editor's Note: The early life of Sulejman Talovic in Bosnia and the possible impact of the war on the young killer and his family will be detailed in a special report, "Roots of murder," in Sunday's Deseret Morning News.