author hillel levin interviewed larry hall. >> it was a very cluttered household. they were raised with dysfunction. >> neighbors say their mother was domineering. their father drank and sometimes turned violent. he worked at the local cemetery. what was it like growing up next to a cemetery? was it creepy? >> no, not at all, not for me. you know, at 12 years of age, larry and i started working at the cemetery. >> as he grew older, larry had problems fitting in at school. >> he was always the backward twin. i was the more dominant, out-going twin. he hung out with what my wife and i and a lot of fellow classmates, called "the misfits" or the "stinky" crowd. >> still, the boys were best friends, and as young men gary and larry developed an unusual new hobby as civil war reenactors. >> i met a lot of new friends during that time period. i was able to travel around and meet them at the battlefields and go on tours and stuff. it was a lot of fun. >> larry was hooked, even growing the mutton chops from his hairline to his jowl. though the re-enactment helped larry make

author hillel levin interviewed larry hall. >> it was a very cluttered household.re raised with dysfunction. >> the neighbors say the mother was domineering. the father drank and sometimes turned violent. he worked at the local cemetery. what was it like growing up to a seb cemetery? was it creepy? >> no, not at all, not for me. at 12 years of age, larry and i started working at the cemetery. >> as he grew older, larry had problems fitting in at school. >> he was always the backward twin. i was the more dominant out going twin. he hung out with what my wife and i and a lot of fellow classmates, called "the misfits" or the "stinky" crowd. >> still, the boys were best friends and as young men gary and larry developed a unusual hobby as civil war re-enactors. >> during that time period, i was able to travel around and meet him at battlefields and go on tours and stuff. it was a lot of fun. >> larry was hooked, even growing the mutton chops from his hair tlooin his seoul. though the re-enactment helped larry make friends he still struggled with women. >> what was he li

. >> for keen, it was a chance for redemption, to restore his family name and, says author hillel levinwould solve a crime. >> but it wouldn't be easy. fair to say, he was risking his life. he could have been killed. >> it was dangerous, absolutely. >> it was highly risky. these people in those type of places haven't got anything better to do than to try and hurt you and kill you, too. >> keen was unsure, but a phone call home put his doubts to rest. keen's stepmother said his father had suffered a stroke. >> she said he's in really bad shape. we wish you were here. this is terrible that you're in a spot where you're in right now because we could lose him. >> keen needed to get home fast and is there was only one way to make that happen. he had to face an alleged serial killer first. >> i just thought, you know what? however bizarre or how far out or whatever this mission that beaumont wants me to go on, i'm going to do it. >> my gosh, talking about an intriguing mission. has this ever been done before? >> never before. you have larry hall who is in prison. he's a convicted killer, in p