4 to Know for Wednesday, Oct. 8

Catch up on the news of the day with these four stories. Newly released documents say the shooter on a DART train was wearing a mask and used a semiautomatic weapon to kill a passenger. With only eight days left until his execution, Robert Roberson's legal team says there's new evidence in his case. Dolly Parton's sister is urging fans to pray for her because of a health scare. And Tech Tech has a new logo, but not all fans are happy.