an hpd candidate in an elite program. a grant to pay his tuition and $26,000 a year in living experiences. and abruptly dropped out. no explanation. >> it's very unusual for a student to withdraw from the program. >> reporter: but an aurora police psychologist. >> he didn't snap. the stock pile of the armory and the booby trap, this was a lot of premed taded behavior. >> he thought it threw. >> thought it threw. >> reporter: he was already buying guns at local gun shops. four of them in all. overthe internet, he stock piled rounds of ammunition and magazines. how many thousands of rounds of ammunition do you have to buy before it raises an alarm. >> reporter: the government is concerned about how much sudafed you buy. they are concerned about how much fertilizer you buy because of oklahoma city and the bomb that brought down a federal office building. yet, you can buy as much ammunition as you want. it raises an abarm bell. and the fuel suit of body armor and the gas mask he wore in the movie theater. do you think he mean

he was getting his hpd. i thought it was premed. he was interested in the medical field. he came out here to get his phd at the university of colorado. and he graduated from regular, from college with a bachelor of science with honors from university of california riverside. >> and this is a classic thing we say. lives alone, no one knows about him. it's -- it's almost eerie how we seem to pull up the same descriptions. >> it's true he apparently didn't become a recluse until he moved to colorado. he started having problems in school and dropped out of the program, and became more aloof and quiet. neighbors say they knew very little about him until they heard music blairing from the apartment. >> greta: has anyone come forward saying i had a conversation with him and one two,, three, four days leading up to this? >> the problem is that we tend to hound people. maybe they're just not stepping forward. >> i want to know what he was like 12 hours before this happened, where he was. i'm interested in 24 hours, that is what i want to know. >> nobody is k.say this is a spur of

he was enrolled there in neuroscience, hpd program until last month. i want to take you where he grew up in southern california in the san diego suburb. this is where the family still lives, and it's where james hoevms father was. he left the house escorted by police. bag in hand, he left this morning, after his wife told abc news had arrested the right man. and homes escorted to lindberg field. he boarded a flight to colorado. and detectives have been questioning family members where james holmes grew up. >> this family is very upset and taken everyone by surprise. >> the family saying our hearts go out to those involved and to the families and friends of those involved, our family is cooperating with authorities in san diego, california and in aurora, colorado. and as a teenager james holmes attended west view high school. he was a member of the school's soccer team and those who few him say he was a bright boy. >> i remember jimmy being diet. very smart. >> after high school james holmes accepted in uc riverside. the chancellor says the school is in

he was getting his hpd. i thought it was premed. he was interested in the medical field.t the university of colorado. and he graduated from regular, from college with a bachelor of science with honors from university of california riverside. >> and this is a classic thing we say. lives alone, no one knows about him. it's -- it's almost eerie how we seem to pull up the same descriptions. >> it's true he apparently didn't become a recluse until he moved to colorado. he started having problems in school and dropped out of the program, and became more aloof and quiet. neighbors say they knew very little about him until they heard music blairing from the apartment. >> greta: has anyone come forward saying i had a conversation with him and one two,, three, four days leading up to this? >> the problem is that we tend to hound people. maybe they're just not stepping forward. >> i want to know what he was like 12 hours before this happened, where he was. i'm interested in 24 hours, that is what i want to know. >> nobody is k.say this is a spur of the moment thing. the guns found i