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I am evan and washington and this is cnn peer. spec the prosecution rested its case in the double murder trial of alec murdoch. their last witness to give a detailed minute by minute timeline from the night of the murders, some of his testimony conflicts with statements made by murdoch. >> this is going to be the full timeline. >> special agent peter analyzed cell phone data from phones belonging to the victims and alec murdoch as well as gps data recovered from their cars. he presented a timeline to the jury from the night of the murders. >> at 8:44 28 mac:55, what does it reflect? >> you can...

Gps data from his car shows on his drive, he slowed down right around the spot where his wife's phone was found in the woods the following day. >> after passing that location as the defendant's vehicle started to accelerate >> it does. >> radomski tells the jury data shows that murdoch arrived at his mother's house at -- and left at 9:43 p.m. >> roughly 20 minutes. >> murdoch had told investigators that he was at his mother's house for about an hour but this gps data shows he was there for just about 21 minutes. his mother caretaker testified earlier that he stopped by for about 15-20 minutes....

Unreasonably short period of time to inspect and call 911? >> i'm here to testify on this data, not the hypothetical. >> randi joins me now from south carolina. it is fascinating to me what they can figure out with this gps data. i mean, the steps that he took right afterward, the slowing down of the car. it's incredible. >> reporter: yeah. it was a minute-by-minute timeline. and the jury really needed to hear it to put everything just in order for them because they've heard so much evidence. but anderson, that one point where they point out that alex murdaugh's car had slowed down around the ...

Timeline. >> reporter: special agent peter radovsky analyzed cell phone data from phones belonging to the victims and alex murdaugh as well as gps data recovered from their cars. he presented a timeline to the jury from the night of the murders. >> and then at 8:44:55 what does it reflect on paul's phone? >> you can hear alex, maggie and paul in the background. >> reporter: ruddouchlt fski testified about a key piece of video extracted from paul murdaugh's cell phone that witnesses say puts alex murdaugh at the scene just before prosecutors say paul and his mother were killed. >> what time did...

This week he was at husband mother's house for about an hour. but this gps data shows he was there for just about 21 minutes. his mother's caretaker also testified earlier that he stopped by for about 15 to 20 minutes. cell phone data shows murdaugh arrived back home at the murder scene just before calling 911 at 10:06 p.m. >> this is showing the suburb arriving at the kennels at 10:05. >> he arrived. how long did it take for the call to be made? >> less than 20 seconds. >> he told investigators he tried to turn his son over a couple times and check the pulse on both paul and magingly all befo...