As far as what Junior did see or did not see, I don't think they considered LE asking about what happened that day BEFORE Haleigh disappeared. Ron several times gave interviews where he was angry that LE was asking questions about BEFORE Haleigh disappeared.
IMO, Junior was with GGma Sykes that day.
"He was asleep. I got there 10 minutes after we noticed she was gone. I had Junior, he said he didn't know anything...said he was asleep," Haleigh's great grandmother, Annette Sykes, told First Coast News on Monday.
http://www.firstcoastnews.com/news/news-article.aspx?storyid=132095
IMO, what she is saying is that she had Junior who was sleeping. Ten minutes after she got there, they noticed that Haleigh had died.
Then you have the mad dash to GGma Sykes alledgedly to get Haleigh the clothes she wanted to wear that day. Even GREAT parents to not make a dash for a certain outfit.
IMO, the mad dash was to pick up Haleigh to take her to school. Junior was left with GGma Sykes so Ron could sleep. They did not want to admit that Ron/Misty were still fighting so started the lies to make everything look great on Sunday night believing that LE would only be interested in the last time Haleigh was seen and not leading up to that night.