That is an excellent idea! Of course a young woman with artistic inclinations is going to try and draw a pic of her boyfriend, or at least take some photos of him to show her girlfriends.
Maybe somebody somewhere still has one?
Keeping eyes open too for UID males, because for all we know he may have been murdered too.
imo, speculation.
Oh, and I dismissed the thought about any of her pics from that time existing, taking immediate assumption that she most likely couldn't afford a camera (which of course she could get as a gift or borrow from someone sometimes) at that time of her life - and if she did then for sure at least some of her friends would know about it.
Now as I'm thinking about it, scares me that time to get these pics is already gone.
About her drawings - these are good, really good and really pretty, I would guess that if she would left her drawings with someone there will be a big chance that person would keep these, think twice before throwing it away (especially that it could be in form or notebook with collection of portraits, autoportraits etc. and person close to her could be on one or more of these drawings).
But pictures... she was beautiful... that Jim Morrisson lookalike Jean was looking good, there is a BIG chance that wherever they went, they would get invite for a group picture or some quick artistic shoot. Even at this Jean's workplace he could ended up catched in somebodys pictures... but likelyhood of someone still having these pics and being aware of Reet's case, checking out such old memorabilias - slim to none I guess.
With her friends and acquaintances from that time chances would be bigger but are they aware? Are they still alive? Was there maybe some aspiring photographer in her crowd?
I turned my thoughts more to drawings cause if these "Jean's" were using aliases they would likely avoid pictures and posing for drawings but a girl in love or just practicing her skills would be able to draw an excellently accurate portrait just from her memory.
Reet's beauty is hard to forget, "Jim Morrison" look would be hard to forget, gosh, even that Beatlelike haircut of second Jean could stand out enough to still be remembered, even after all these years... it's weird.
And I would dismiss Tex as a suspect. He's a big guy, he had at this point enough blood on his hands to cause way way more damage while killing in rage, i can't imagine him using pocket knife.
Some slim build, bit younger guy or a woman, yes, but Tex doesn't fit.