The LE said during the press conference that all trace of her vanished after Hannah ran into him. Her phone went dead, no pings, which means no battery inside the phone, not just off, or drained enough to be off. I can't imagine Hannah Graham taking her battery out herself for any reason, nor being able to do so. She was described as being held up by him as they left. Maybe she lost her phone before running into him, but the lucid (well spelled and spaced) text sent about being lost on 14th an Wert. which happens to be at the end of her street, on the bus line (if I'm reading the maps correctly), and just by the hospital where he works. That text was sent from the Mall according to the ping on it.
As he's gaining control of her body, arm around her, he's been seen with Hannah Graham, already, before Tempo. He has to create a cover (the text) and lower her resistance to coming with him. He learns where she lives. Sends the text and has his cover. Give her more to drink, spikes it maybe. Sweet dear beautiful vibrant Hannah Graham was too good a target of opportunity. Most of us have had those kinds of nights. Nobody deserves to die for it. He was not going to let go of Hannah Graham's body after that. It was just a matter of not being seen with her after they went away together. I bet he will claim to have left her @ the bus stop. The text maybe confusing, but it is a wild guess as to the context. Him seeming dim-witted means nothing. This is would be very basic need gratification, manipulation, planning, and survival. He was capable of eluding capture well enough all the way to a beach in Texas and still prowling which is what got him caught.
Sounds way to impractical to me. But let's say he drugged her which is possible. When? We know JM gets 'two beers' at 1:10AM. He spikes a drink. Let's say the drug's fastest activation time is 15 minutes. Every college/sorority girl I know takes their time drinking drinks. And not a lot like to drink beer. It gives them glass and bloats there stomach. She was wearing a cutoff shirt that night too. Girls think about things like this. Girls certainly don't chug 'em (beers) down like us guys. But let's say she chugged it down and was finished and drugged by 1:15. Effects start happening at 1:30. You'd think people in the bar would notice a rather large black male supporting and young while female. Not just the door person who works for the questionable Tempo establishment. It just seems very improbable things happened this way. Also, I imagine that HG would be socializing in the bar. Not just sitting in a table drinking a beer.
But maybe, like others, you believe HG was never in Tempo and JM sneaked out a couple of drinks. They couldn't be mixed drinks with open tops so they would have to be beer. To me it is unlikely she waited for JM while he was inside ordering drinks. It is even more unlikely to me that JM would have sneaked out a beer for Hannah to chug right in front of the Tempo establishment. Then drink her drink fast enough for the drug to take such a noticeable effect where she suddenly loses the ability to walk(as noted by a Tempo employee, I believe). Doesn't add up to me. JMO of course.