. >> journalist and author john mclean wrote the book, "the esperanzo fire." the fbi has a profile.is a white male, blue collared, 26 or less, abused as a child, with difficulty maintaining a relationship. who has bad job records, i would add to that the element of drugs. >> the fire was one that scorched 40,000 acres. starting east of los angeles, along the banning pass. the pass between two mountain ranges became notorious with a pal that attracts arsonists. >> fires can be set by lightening or arsonist. what is it about the set up. >> if i drive through the pass and think about fire, it's a natural fire ground. the landscape is an invitation, they have a high rate of criminal activity. >> we are approaching the start of the esperanza fire. it was a job to cut down the state's firefighting agency. we met the investigators along the pass. >> we are at the point of origin of the esperanzo fire that firefighters. >> we are standing where it started. what happened? >> the suspect that started this fire needed the time to make device, placed it out here in the grarks in the brush. away