and by the time you made that call you said something to sergeant lee you're about or did they take them already by the time you made that call re still able to see the video from the street camera yes that video etc and what did you see at the time you were making that call they nobody was there so you are aware and have millions have come to the same yes but the ambulance was not in the video at that time so that is the reason why you made a reference to them being wrong yet still i was speaking to the rest of my team over there and asking at question to that was on the phone right sergeant. so probably a better time for me to ask this question but if you ever prior to that date made a call like that to a sergeant now or in your job. well for the question. sure. all right so they are breaking for a lunch break as you heard and just to recap what we were just listening to and watching on our screens the prosecution was examining witness testimony the 1st witness to take the stand in the murder trial of derek was janice curry she's a 911 dispatcher in minneapolis who reportedly alleged a

months after he left, billy returned. >> my name is billy lee, or william actually. >> reporter: and sergeant had his chance to question him. >> how long did you know cassy? >> i knew her when she was a tech in the emergency room. >> reporter: curiously sanchez did not ask why billy removed the carpet or why he suddenly doing off for alaska but he did ask about the nature of billy's relationship to cassy. >> we were real good friends. we didn't go to bars together and we didn't go fishing together. we didn't do that kind of stuff but we had a working relationship that was pretty close. >> reporter: really? back at the crime scene day of the murder, he claimed he barely knew her. now they were pretty close. too close? billy told the detective he had an alibi. he and a buddy were out in the country working on his cabin. >> we were working on that roof and when i got the call, we'd been out there for a couple of days. >> reporter: but, of course, as any detective could tell you people lie all the time about alibis. sanchez asked billy to take a polygraph. >> did you inflict any injuries to the v