54-year-old hospice nurse cindy ann yuill who was christmas shopping. and 45-year-old steven forsyth, a father of two who ran a business in the mall. and wounding this 15-year-old, kristina, now in the hospital. the woman who raised roberts released this picture of a once happy little boy, and asked her friend to read a statement. she has no understanding or explanation for her son s behavior. she s very sad and wants everyone to know she s so sorry for what jake did. it s so out of his character. reporter: police are running down search warrants on the shooter s home and car, trying anything they can to get into his frame of mind. so far, from everything we know from friends and family, there is just no good explanation as to what set him off. neal karlinsky, abc news, portland. the lingering question of why. in other news this morning, cal state s fullerton campus is on lockdown this morning as police search for two men believed to be armed and dangerous.