is your mossberg in that rack? >> yes, it's the middle one. >> reporter: lucas talked to deputies about the gun on the day of the murder. >> i told 'em that i hadn't took it with me and it should be there. >> reporter: but his 12-gauge wasn't there when crime scene techs scoured the trailer. and cops knew another place it wasn't -- on the list of guns written out for the dci agent. investigators felt certain the mossberg was used to kill lisa, but a big question remained. >> where is it? that's what we wanna know. where is the gun? >> reporter: that same sunday morning, a team began searching the big, beautiful piece of property where seth and lisa were starting married life and preparing to raise a family. deputy marty wonderlin, working his first-ever homicide case, was back at the scene. not too long into this sunday morning search, over here by this big old tree, what do you hear? >> i hear, "we've got it. you know, shotgun here." >> reporter: there was the mossberg in the tall grass, about 20 yards from the ba

investigators felt certain the mossberg was used to kill lisa, but a big question remained. >> where is it? that's what we wanna know. where is the gun? >> reporter: that same sunday morning, a team began searching the big, beautiful piece of property where seth and lisa were starting married life and preparing to raise a family. deputy marty wonderlin, working his first-ever homicide case, was back at the scene. not too long into this sunday morning search, over here by this big old tree, what do you hear? >> i hear, "we've got it. you know, shotgun here." they were goin' nuts. >> reporter: there was the mossberg in the tall grass, about 20 yards from the back door of the trailer. in that case. >> it was. i think everyone's, you know, mood doubled or tripled when they found that gun. >> reporter: ballistics would later match the mossberg with the slug that killed the pregnant lisa. investigators could fill in one big box on their checklist -- murder weapon. next, they worked on possible motives -- was it a neighbor with a vendetta or a husband lusting after another woman? state agen

investigators felt certain the mossberg was used to kill lisa, but a big question remained. >> where is it? that's what wanto kw. where is the gun? >> repte tt same sunday morning, a team gan searching the big, beautiful piece of propertyhe seth and lisa were starting marriefe and preparing toaise a family. depu marty wondein, working his rst-ever homicide se, was ba at the scene. >> not too long in the sunday morning arch, overe thisig o tree, what doou hear? iear, "we'vt it. you know, otgun here ey were going nuts. >> repor there was mossrg in e tall gra abt 20 yards from the ba door othe trailer. >> boy, that was a huge development in that case. >> it s. i ineverneu know, oubled oled wh theyhat n. rorr:alstics woul lar tcthe mossrg with pregnant lis investats d fill in one g box on theirlist -- murder wean.th next, they word on possible moti was it aeighbor wi veetta or husband lusting afr anotwoman? ate agent birmingham and ty phis decided toave with seth's wfrie, rachel. >>e interviewed heon day, m 2h. >> there's no tricks he, meone halost tir life. actually two people have lost

when we come back, according to walt mossberg, apple and google should win the coming battle over thelt will join us live. google going after facebook with a big move into the virtual reality space. a top goldman analyst will tell us why this has the potential to become an $80 billion a year industry and powerball is all anyone is talking about today. that record $1.5 billion jackpot. how big of a chance someone even if it's probably not you stands to win this time around. we weather we continue in a moment. sure, tv has evolved over the years. it's gotten squarer. brighter. bigger. it's gotten thinner. even curvier. but what's next? for all binge watchers. movie geeks. sports freaks. x1 from xfinity will change the way you experience tv. choose, choose, choose. but at bedtime? ...why settle for this? enter sleep number, and the lowest prices of the season. sleepiq technology tells you how well you slept and what adjustments you can make. you like the bed soft. he's more hardcore. so your sleep goes from good to great to wow! only at a sleep number store... find the lowest prices of t

also, walt mossberg is talking about cars, the dashboard, who is going to own it? tech or detroit?out powerball. just too big not to talk about. all that and more coming up on "squawk alley." >>> one of the most anticipated lottery drawings in history. it's 11:00 a.m. on wall street, and squawk alley is live. ♪ i never dreamed that i would climb over the moon in ecstasy ♪ ♪ ♪ i've got a golden ticket ♪ i've got a golden chance to make my way ♪

still to come, the critique of twitter today from walt mossberg, their head of product goes to instagram almost 100 points. anything worth pursuing hard work and a plan. at baird, we approach your wealth management strategy the same way to create a financial plan built to last from generation to generation. we'll listen. we'll talk. we'll plan. baird. >>> bill ackman issuing an apology after his hedge fund suffered its worst year last year. in 2015, pershing lost 15% to 20%. he writes when the stock price rose this summer to the mid 200s per share, we did not sell as we believed it was probable the company would likely complete additional transactions that would meaningfully increase in intrinsic value. in retrospect this was a costly mistake. >> a number of others as well, platform, a company which has gone down dramatically, canadian pacific also. interestingly he says valeant had actually considered selling some this summer but were locked up because they were in possession of knowing the company was considering a large deal of some kind. doesn't give us indication of that. some of th