Wow. It's possible that all any of us know is just the tip of the iceberg.
Thank you Mickey for getting this guy off the streets, too bad it didn't happen earlier.
A few additional names of girls in the same age range and such all taken from close areas within weeks as Ali turned up in the comments area from the first article:
Cynthia Tucker (first missing) April 12 2010 - MONDAY
Chasity Armstrong (second missing) April 16, 2010 - FRIDAY
Jordan Johnson (third missing) April 23, 2010 - FRIDAY
Ali Lowitzer (fourth missing) April 26, 2010 - MONDAY
Alyssa Lynn Suarez (fifth missing) May 3, 2010 - MONDAY
I just looked up Cynthia Tucker and here is the WS thread that came up about her:
Alexandria Lowitzer, Chasity Armstrong, +?, Houston area, April 2010 - Related?
http://www.websleuths.com/forums/archive/index.php/t-103810.html
Might be worth looking into.