PITTSBURGH -- Police continue to receive new information on the disappearance of a mentally disabled Sheraden man.

Call Police at (412) 665-4020 with information July 1: 6 p.m. Jamaur Jackson reported missing from his Sheraden home July 2: 8:30 a.m. Aaron Martens reported missing from Peters Township; did not go to Triangle Tech July 2: 6:30-7 p.m. Waitress said she spotted the victim at J. Clarks Restaurant on Pine Creek Road July 3: 7:55 a.m. Suspect's car found at Greyhound bus station

The problem with these clues is the chronological questions they pose.

Jamaur Jackson (pictured, below right), 18, was reported missing Tuesday evening from his home in Sheraden.

Wednesday night, a waitress at a J. Clarks Restaurant in the North Hills told police she saw him with an unidentified woman and Aaron Martens (pictured, below left), 28, of Peters Township.

Thursday, police identified Martens as a suspect in the case.

Also Thursday, police found the suspect's vehicle at the Greyhound bus station in downtown Pittsburgh. But a parking attendant said the car has been there since Tuesday afternoon.

That means the car was there before Jackson, Martens and the unidentified woman were reportedly seen at the restaurant.

Now police are trying to determine whether Jackson and Martens left on a bus, or were driven somewhere else.

Martens has been missing since Tuesday after he didn't show up for school at Triangle Tech.

Police said Martens is on antidepressants and is under the care of a psychologist. He was recently released from the military after spending two years in prison for downloading and storing child pornography.

Jackson's family members said it is difficult to deal with his disappearance, plus knowing he may be with a man with a criminal background.

"It's super hard. (It's) something imaginable to go through, something like this and know this person has a history and what he's served time in jail for," a family member said.

Anyone with information is asked to call police at (412) 665-4020.