OK, so the prosecutors in Colorado proved me wrong.
I was absolutely sure that they had some other evidence. After investigating this guy for several months, and having him under surveillance in Thailand, they finally decided they had enough to put him away for life. Investigate first, arrest second, right?
Uh, wrong.
Prosecutors decided to take a gamble. Like the "glove" from the OJ Simpson case - "If it don't fit, you must acquit." Sometimes you take a gamble and win, and sometimes you lose.
So, they will attempt to convict this guy on "possessing child porn" from 5 years ago. But prosecutors in California think he might have served most of the jail time already. So he'll be a free man in a matter of weeks.
Oh well. This case will probably never be solved. Another in a long line of unsolved murders.