Police are now trying to find anyone with information on the identity of a man seen in the area about two weeks before the head was found. He is described as being in his early to mid-20s with short dark brown hair and long bangs that went across his face. He is about 5 feet 4 inches to 5 feet 8 inches tall with light skin, and he was wearing a gray and black plaid shirt.
Police say the man was driving a teal or blue-green Chevrolet Silverado extended cab pickup truck. The back left passenger window was broken and had what appeared to be cardboard over the window. The truck is described as having lots of rust and looking as if it had been wrecked several times.
Witnesses told police the man got out of the truck from the front passenger side and then threw a black plastic bag off the bridge.
Investigators told Eyewitness News that they believe someone threw the trash bag over the bridge, aiming for the water, and missed.
Police say the victim appeared to be a white or Hispanic female between the ages of 20 and 45 years old.
Detectives with the Houston Police Department are looking into missing persons cases in Harris, Montgomery and Liberty counties.