david, who kept curiously close tabs on anna. but wait. there s more. her colleagues pointed detectives toward another special friend of anna s. coworkers indicated that she had a close relationship with dr. wiorkowski. reporter: dr. john wiorkowski is a vice provost at u.t. dallas. anna took one of his classes. i knew her for about six years. but then about three years or four years ago, what she was doing coincided with something i was doing. so we worked together more, so that s how it sort of sort of became friends. she liked music, i liked music. reporter: before long, anna and the married professor were spending time together outside of work. as the professor told it, they became even closer around 2012 when anna s marriage hit a rough patch. the two met most mornings for tea and sympathy.
okay. i don t know what you re talking about now, but it sounds like you re accusing me of something. we re we re fact-finders, okay? good. i hope you find the facts. you re making it hard for me to find the facts, bob, because you can t tell me [ bleep ]. you know what? i m done i m done talking to you guys. i m done talking to you, okay? because i don t know everything i did that day, and you re trying to twist all this around now. reporter: with that, bob strode out of the room, but not out of suspicion. do you guys think you have your man? we were pretty confident that he was gonna be our guy. reporter: on february 26, 2015, six weeks after anna was gunned down, bob moses was arrested. it was his birthday. he d spend it behind bars, facing a charge of murder. and that s where we interviewed him. did you kill your wife? no, absolutely not. i would never hurt anna.
consider the cast of characters who had reveled in the glow of the anna moses starlight, and then mourned her passing. and some began to drop off the list of suspects. including anyone she might have recently met from online dating. so anna did have a match.com account. but she hadn t been on it, or actively searching or looking, to our knowledge. and that s verified through the match.com records. so at least from match.com, she wasn t dating anybody except the boyfriend? correct. reporter: and the first real suspect was one of the first to be cleared. igor, the son, not terribly interested in helping law enforcement. says he doesn t want a funeral for his mother, says whoever did this should be forgiven, and he s the beneficiary of a $750,000 insurance policy. yes, sir. reporter: but, given that police believe anna was killed around 6:00pm. igor had a good alibi. where was igor when she was killed? in class.
time stamp says 6:59 pm, police determined it was actually 5:49 pm when anna s car drove by. did you have an idea of when anna was when you believe about the time she was killed? based on the fact that she s checked her mail, um because the the mail is strewn underneath her. it s loose. i believe it s soon after she arrives there inside the garage. reporter: the police theory at about 6:00 pm, bob shot anna seven times six bullets found their mark. he then spread four other shell casings on the garage floor, took anna s car, parked it a few blocks away, and tossed in the cigarette butt and the can of red bull. in a weird way, you ended up with too much evidence. i mean, there s all this stuff that is there uh-huh. reporter: at the actual scene of the murder, and then later in the car. the you know that didn t make any sense. that s right. it made it feel more like this was designed to sort of throw
up his bermuda shorts, if you d ever been to new york city you d know about the subway. that was one of the wrong wrong thing to say? yeah, bob did not feel good unless he was putting someone else down and trying to elevate himself. tell me about michael? well michael is very low-key, very kind, very sensitive. sounds like you approved of michael a lot more than bob? oh, absolutely. yes. i mean, michael is 20 years younger than bob. much more handsome, much more intelligent, much more successful, much more accomplished and much wealthier. what s not to like? and yet, anna and michael did not get along perfectly, did they? oh no, there was lots of of squabbling. reporter: it was dawning on anna s friends how little they