the calls were traced to the small town of bear, delaware, to a young man named rickie spencer. got any offense reports, if there's a sheet on him. coming up clean. >> sure. his dad has his own veterinary cling, well-to-do, the mother and father are extremely caring. he has siblings. >> reporter: it didn't make sense. why would a college kid from delaware have anything to do with an older ex-military man from virginia? in mid-june, eight weeks since venus went missing krieger and henderson decided to find out. they got in the car and headed east, destination, bear, delaware. would the man on all those phone logs hold the key to what happened to venus stewart? something peculiar about this mystery caller. >> he looks a lot like doug, he could pass for doug. >> reporter: a dramatic turn in the case that no one saw coming. guacamole guacamole guacamole guacamole guacamole see? come in and try our new guacamole on sandwiches like the chipotle chicken melt. and discover how it turns up the flavor on all your favorite sandwiches. subway. eat fresh. too much? maybe without the flower..

ricky spencer.orter: chief prosecutor john mcdonough called on his star witness who, in the course of two days would tell one of the most mind-boggling stories ever heard in the st. joseph county, michigan, courtroom. >> call your next witness and we'll have him sworn in. >> we call ricky spencer. >> reporter: ricky, now 21 seemed like a young boy in a grownup world. his dress shirt not his customary tee ran big in the sleeves. >> how do you know mr. stewart? >> met him on xbox live december of '08. >> how often did you play xbox live with mr. stewart? y. >> in where from six to ten hours. >> a day? >> on a daily basis. >> this was his life. some people might sit and read, he played xbox. >> reporter: even though he'd never met him, ricky told the jury he felt a strong tie to the former marine. >> would you say he was your best friend? >> yes. he called us brothers from another mother. brothers from another mother. >> called you that? >> yes. >> this was his idol, probably one of the very few people