glenn sandler?y defense, he ultimately pleaded guilty to solicitation to commit first-degree murder and trafficking in cocaine. he got 15 years in prison. what do you think about this guy now? >> i don't know what to think because i do not know that glenn sandler. i know the glenn sandler who taught me things about business. cutting edge but i do not know the glenn sandler, the killer glenn sandler. >> did anyone? which is why is one time colleagues are a little guarded when they tell their stories about the man who would kill rather than lose. >> knowing he is capable of that makes him capable of remembering everything he knows after 10 years and wanting revenge. >> do you worry a little -- >> about this? yes. >> why? >> i don't know. hopefully, he comes out being a nice guy. >> but? >> who can say. >> betty sold the house of the aero club and moved away. tragedy would not let her go. neither betty nor glenn. >> he had two sons. one was in jail and one died in a motorcycle accident. his father died

. >> as for the deli, went to glenn sandler's brother but they had yet to perfect the recipe for the creamiest chocolate cake around. the cake to die for. that killer cake. >> that is all for this edition of dateline. i am craig melvin. hard to thint could happen to someone. craig melvin: ...a dive instructor and his wife is dateline. >> it's hard to think that that could happen. >> a dive instructor and his wife on a dream trip to the tropics until he scuba adventure turns into a disaster. >> she never reached the surface. what happened some 80 feet down? prosecutors called it murder. a wife lost in the deep. a husband becomes the accused. >> did that happen? >> absolutely not. >> now, hold your breath for the twist. were captivatequa blue waters of tortola. >>> hello, and welcome erwato dateline. scuba diver shelley tyer and her husband david swain were captivated by the aqua waters of portola. but for one of them , the breathtaking views would come at a deadly cost. the tragic twist that would expose family secrets as dark as they come. here is dennis murphy with the last dive. >>