From:
http://www.squidoo.com/ElizabethPfeiferWhat Happened That Night Elizabeth left my parents' home in Katy, Texas, in the early evening of Friday, April 12, 1986. She went with Frank Henry and four other friends in their vehicle to a party on the outskirts of Katy. The place was not far from my parent's home, in fact, under 10 miles.
While there, Elizabeth proceeded to become very drunk. This was typical behavior and her friends knew it. Around midnight, she left the party with an unknown man. Her friends knew she was leaving, but they did not know the person she left with. In fact, Elizabeth and her friends did not know the people who held the party. The group of friends went because they knew friends of friends of friends who were invited.
From there, the story gets messy. At first, however, the man that Elizabeth left the party with was found and questioned and he refused to talk to the police. He said that he knew nothing. Because there was no evidence, no body and no signs of foul play, the police told me there was no way to make this person talk to them. As the years went by, that same man was found to be in prison and the Katy PD went to speak with him. They told me that since he was incarcerated, they could force him to take a polygraph test. He told the police at that time that yes, he had left the party with my sister.
He took her to his apartment in Houston, on the east side. They had sex and used drugs. He then took her back to Katy. He said that they stopped at a gas station on North Mason Road and as he was filling up his vehicle with gas, Elizabeth left him. She acted like she knew the person she saw at the gas station. He drove a brown pickup truck.
This man passed the polygraph test, according to the police. He was married, and I never knew what his wife thought about him bringing Elizabeth home, or if she even knew that her husband was the supposed last person to see Elizabeth alive.