MSNBC Dateline December 7, 2019 09:03:00
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: ...