Making a few corrections to the timeline someone posted...
Jovonna left the Powell home on Sunday between 5pm and 5:30pm. She saw Susan lie down, she saw Josh lock up, saw him load up the boys, and they both got in their own vehicles and drove away at the same time.
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On Monday, apparently it did not occur to any of the neighbors to try to call Josh. They knew the family (Josh's mom and sister) and LE had tried his phone several times and he never answered, so why would he answer for them?
Finally around 3pm, Jovonnas teenage son (who had been helping Josh out in his basement and was learning some wood working skills from Josh) thought to try and call him and guess what? Josh answered. The son quickly hung up because he didn't know what to do, didn't think Josh would answer.
He told Jovonna about it, who quickly called Josh back and Josh answered again. She explained to him that everyone was worried, since it appeared they were all missing, the cops were over there, they broke a window to get in, he needs to go home right away, etc.
She also asked him, "Where is Susan?" His response was that "she was at work." Then we all know that it took him 2 hours before he showed up at the house.
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This leads me to the next thing...
LE was INDEED at the Powell home waiting for Josh until he got back on Monday. The did NOT leave before he got home. They immediately took him to the station for about 2 hours to question him.
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The last thing to clear up on the timeline is that Chuck Cox arrived on Friday December 11th, not Saturday December 12th like some people have it reported.