there were no shell casings? yes, it told us that it was a resolver. reporter: that s because resolvers keep the bullet casings inside the begun after firing. i can only imagine how ti how terrified he was in the final moments. he was doing what he did every day. he was going to work. reporter: now they feared he died for the work, and they could be next. no one felt safe. we didn t know if there were people waiting to shoot us. reporter: the courthouse was locked down in the morning and closed for the day. they were given extra security. they were walking us to our cars carrying huge rifles and guns. reporter: when did it sink in to you that it could have been me. you walk in to work with mark. your office is there. that was the immediate fear. it could have been any of us. we lost a really, really good
i mean, we really did love him. it was devastating when he was gone. reporter: monday morning, four days after the murder of mark cassie, fellow prosecutor shannon abare, returned to worker with a heavy heart. of course, it was a hard monday in our weekly meeting without mark. our whole office was devastated. i mean, his door was closed. reporter: security remained tight in and around the courthouse. the people inside took on a bunker mentality. folks were trying to deal with what happened. nobody has ever done this before. this is new territory for everyone. reporter: his colleagues were terrified. and many wanted to carry guns for protection. district attorney mike mcclelland made it easier for everyone to get concealed
we just didn t know if we at that moment had enough evidence to convict him. reporter: they just had to figure out where the evidence might be. did you think that eric williams had a hiding place? we began to suspect pretty early on if it s eric williams and we know what cars were used there may be a storage unit or some secret storage place that he may have access to that we haven t found. reporter: at least now, 10 weeks after hasse s murder, the investigation was finally on a roll. we go home that night to get a good night s sleep and i actually wanted for the first time in weeks to see my son play a little league game. reporter: but the next morning, his parenting plans were dashed by work again. his phone rang. it was a friend of eric williams, who d heard about his arrest. and said, mr. wirskye, i have something to tell you about eric williams. i think i may have rented him a storage unit. we d been looking for a storage unit and i could tell when i listened t
that has somebody upset? reporter: investigators looked in to every local case he prosecuted. there was robberies, drug prosecutions and a theft that involved an elected official that stole office equipment. they didn t immediately find anything that led them to a suspect. u.s. marshals pulled in anyone with an outstanding arrest warrant. nothing there either. so, the task force widened the scope of the investigation beyond kaufmann. we don t have a lot of violent crimes in va crimes i kaufmann, especially murders. so we assumed dallas. reporter: the big city less than 30 miles, but seemingly a lifestyle away. remember, back in the 1980s, mark and marcus bush locked up tough customers there. i started to think of the organized crime cases and the murder cases that we prosecuted were life sentences and starting
against her husband. it was a cold day and there was excitement in the air. witnesses to the hasse murder said the shooter jumped into the passenger s side of a getaway car. so police always suspected williams had help. soon after he was arrested, kim was brought in for questioning. they spent hours talking to her. and the prosecutor was watching the interview. she was not going to give up any information. she talked about her husband, what a great guy he was and how he wouldn t hurt anyone. and then an fbi interrogator growing impatient got tougher. he raised his voice with her and was telling her that she knew that those people had been killed. then she broke and what she told them was startling. she said not only did she know something about the murders, she helped her husband carry them out.