she worked at a hospital where she might have had access to midazolam. we made sure all the midazolam that they had was accounted for during that time period. reporter: they also asked her to take a polygraph test. she took a polygraph? yes, she did. reporter: pass? fail? passed. so she was ruled out, in in our eyes. reporter: that left one person policed needed to talk to again, her former lover, gil. and this time, they planned to confront him with all their suspicions. they ski decided to gri him in for another talk. it lasted approximately seven hours. reporter: that s a long time. it was. there was a lot to cover. our biggest thing was the midazolam. the other thing was the vehicle. reporter: a team of investigators took turns confronting gil. they told him they had a video
passed. so she was ruled out, in in our eyes. reporter: that left one person policed needed to talk to again, her former lover, gil. and this time, they planned to confront him with all their suspicions. right there we stop. right there we stop. coming up was that mystery suv really gil s? your car is on the road and you were driving it. and the sedative in tom kolman s system. i looked into reporter: ulster police had been keeping an eye on local dentist, gil nunez, since they learned he d had an affair with tom kolman s wife. but now they believed tom s death was no accident and suspected a medical sedative was somehow to blame. so they decided it was time to bring gil in for another talk. are you and linda still we re close. it woulda lasted approximately seven hours. reporter: that s a long time. it was. there was a lot to cover. our biggest thing was the midazolam. the other thing was the vehicle. reporter: a team of investigators took turns c