Did Emma give a specific time she started to text Katie and got no answer? That is a key time. But I have heard is that when she got home and Katie wasn't there, she started texting and calling, but didn't hear her say a time. Emma said that when Katie didn't respond to the text she immediately knew something was wrong. So by that time, the attack had likely occurred or was underway.
There are alot of missing times that would help figure this out.
1) We don't know what time Katie & Bowie left the apt.
2)...what time they arrived at Henry's.
3)...what time they left Henry's.
4)...what time Emma left work.
5)...what time she got home.
6)...what time she left apt to look for Katie & Bowie.
The only times we have...
1) Arrived at Henry's between 11 & 11:55.
2) Left Henry's between 11:05 & 12:00.
3) Crossed 10th St at Piedmont 12:09 (see FoxNC for time stamped photos...you have to scroll way back)
4) Emma leaves work between 12:05 & 1:00 (She stated she left work about an hour after Katie left).
5) Per Joe Clark, Emma finds Katie at 12:57am. (See exclusive interview...I believe the 2nd interview with Aunjelique Proctor (sp))
6) Emma talks to 911 at 1:10am.
Some of the approximate times we have overlap or simple don't calculate which makes it difficult to come to a conclusion.