in a search for suspects, joshan's family suggested police interview john hansen, a 60-year-old familylived nearby. >> john was an older gentleman who hung out at the house all the time with us. in my opinion, he seemed after a while to get too close to the children. he always wanted to be their friend, more so than the friends of an adult. >> within 24 hours of finding joshan's body, investigators went to hansen's trailer to question him, but he was gone. >> we talked to the park manager and some of the neighbors and they said they hadn't seen him in a day or two. >> a background check revealed hansen, a day laborer, estranged from his wife, had no history of violence. >> a 60-year-old man, having teens hang around his house does lead to suspicion as to what is going on. >> while police searched for hansen, criminalists measured for tire impressions found near joshan's body. those measurements and tread patterns were entered into a computer data base of 20,000 different tires manufactured around the world. >> there were then several different manufacture models that could have made th

if you ask me and james hansen, an authorized biographer, i would venture that he was a moderate republican who believed in states rights. he would have voted for john glenn from ohio and was for glenn in the senate. he judge people by their character. that last quote i read about him, he wants to go to mars. where does the money come from? he was a pragmatist in these ways. if he could do anything, just promoting -- one thing he wanted to do and never got to do was write a great engineering textbook. it showed that he had interest in writing. even though -- i quizzed him enough that he had read all of hg wells and jules verne. he's exceedingly well read. he is not someone who thought only in engineering terms. he had a great humanity's side. he tended to read texts about exploration and war more than novels. >> two of our picc students want to close the program. >> great. >> first, i like to thank you for attending this forum. my name is jonathan goodwin. i'm a third-year student in political science. >> i am a senior in political silence. science.cal dr. brinkley, please accept this token of appreciation. [applause] >> thank you all very much. >>