I've done a little checking into this case, and here's what I've found so far. Long post.
I don't know where it originated, but there has been some misleading information put out on this case, and then repeated on other websites and by the media.
I questioned that in 1974 the US post office could move so fast as to deliver a letter the same day as it was postmarked. Well, they didn't. The letter was postmarked on the 24th, but wasn't received until the girls had been missing for several days.
The Ft. Worth Police reported that the letter was not mailed from Weatherford or Eliasville, but was mailed in Ft. Worth. I have no idea why bogus info would be put out, but it certainly doesn't help solve this case.
Another thing, Rachel's car had been found by 6:00PM on the day the girls went missing. The stores hadn't even closed. The parents of the girls reacted quickly. When the girls didn't show up by 4:00PM the parents started worrying, and by 5:00PM, knew something was really wrong. They called the police, the hospitals, the girls' friends, everything a panicked parent would do, they did. The parents said the police initially dismissed the girls' disappearance as runaways.
I think I will call the Ft. Worth Police next Monday to find out, first hand, what info that's been made public is solid, and what isn't.
Does not look like the police think this was a random kidnapping. Tommy Trlica, Rachel's husband was under suspicion very soon after the fact, and he has not been the only suspect.
According to Rusty Arnold, his sister, Debra Arnold Hopper did finally consented to a polygraph test in 2001. At that time, Rusty Arnold expected to have the case solved shortly. Since that didn't happen, I'm guessing that Debra Hopper passed the polygraph test. I'll see what I can find out.
I don't know what else he does, but Rusty Arnold is also a singer/performer, and has written a song about the disappearance. I really don't know what to make of him. The song may have served two purposes, getting the girls names out there, but also, a more self-serving purpose. I have not yet listened to the song. It is posted online.
Rusty Arnold also claims to have very good information that his sister is alive, and returns to Ft. Worth every year around Christmas. He claims he has credible eye-witnesses, people who know, knew Rachel. I can't imagine, in all this time, if that were the case that someone wouldn't have turned her in to LE. If Rachel were alive she would have to live somewhere and work somewhere, and yet no neighbor or co-worker has come forward with a lead on her whereabouts. If they had, she would've been taken into custody, and this would've been on every TV station in the country and online.
It's been reported that Tommy Trlica offered a $2000 reward, but after a year, sold his house and moved away. I know he married a third time, and his present wife (if they haven't divorced) is a Linda Ishmael who graduated from high school in Frisco, Tx in 1976. I found her on reunion.com where she listed herself as Linda Ishmael Trlica. In 2000. they reportedly were living in east Texas. January of 2008, they were living in Galveston, Tx. Found her and Tommy Trlica listed in attendance at funeral on an obit. listing for Linda's brother. She has numerous siblings. I had to ask myself how she and Tommy Trlica met, and when. With 13 siblings, I wondered if one of her brothers wasn't working with Trlica in Ft. Worth or wasn't hanging out with him in 1974. Of course, if he left Ft. Worth, he may have moved to Frisco.
Here are a few links in no particular order:
http://www.missingtrio.com/TRIO/news41301.htm
http://tinyurl.com/8hqpxk
http://namesdatabase.com/schools/US/TX/Frisco/Frisco High School
http://www.e-cinc.com/obituariesn.html.
http://www.angelfire.com/mi3/mpccn/trlica.html
http://chriscrimeforum.freeforums.org/3-young-girls-go-to-the-mall-t987.html
I did not find the one link I really wanted to post which contained several articles from several different newspapers. I will keep looking. In the meantime, I apologize for any repetition in links that others may have already posted. I am just too tired to think.
One thing that struck me as odd, is that the families hired a P.I. to work the case in 1975. He died in 1979; his death listed as drug overdose and suicide, and "all his papers destroyed as per his request." I will check that out with the Ft. Worth Police because that sounds hinkey to me.