FOX 4 News Crime Files: Week of August 4

The top Dallas-Fort Worth crime stories for the week of August 4, including a knife attack after a crash on 635 in Dallas, a Tarrant County deputy who was shot while serving a warrant to sex assault of a child suspect, a woman who says she was groped at an Arlington Walmart, the State Fair of Texas banning guns from its fairgrounds, an assault investigation involving children and a Dallas couple who says a surrogacy escrow company ran off with their money.