According to Greene, the light rail system then began operating in both directions on the southbound track.
Greene said it was "extremely unusual" but not unprecedented for the MTA to find guardrail or other obstructions placed on the light rail tracks.
At about 3:10, Greene said, another northbound train was traveling north on the left-hand track when the operator and fare inspector spotted something they could not identify on the track they were passing over south of Lutherville.
She said the fare inspector got off the train at Lutherville and walked back to the site as the train continued its northbound trip. When the fare inspector discovered the two injured teenagers, police and emergency medical personnel were summoned.
Wankmiller was transported to St. Joseph Medical Center, where he was pronounced dead. Peterson was taken by medevac to Maryland Shock rauma Center, where he died the next day.
Greene said police have not been able to determine whether there was any connection between the guardrail and the two teens. She said no fingerprint evidence had been found on the guardrail.
After the teens were found, the MTA temporarily shut down the light rail system and began checking all trains that had been in the area for signs of impact, Greene said.
The spokeswoman said that no evidence was found that any train had hit a person who was in an upright position. However, she said, when MTA employees inspected the undersides of light rail trains that had been in the area, they found physical evidence indicating that two trains - the 3:10 and one that came through the area about 2:55 - had passed over the bodies.
An examination of video from the 2:55 train solved what had been a mystery - police were considering such explanations as homicide, suicide and a daredevil stunt gone wrong.
Greene asked anyone with information about the incident to call the MTA Police at 410-454-7720. "We still need a lot of help in ferreting out what happened."
The MTA spokeswoman said she hoped the incident would deliver a lesson.
"We just implore people to be extremely safe when crossing our tracks," she said. "This is not something we take lightly. Trains of any kind can be dangerous."
At Dulaney High School, which both boys had attended, Parent-Teacher-Student Association President Terri Seitz Parrish said the tragedy follows several others this year.
"This is difficult for our kids," she said. Kyle was expected to enter his junior year this fall; Connor withdrew from school in May 2008.
In January, Dulaney senior Conrad "C.J." Utanes Jr. was fatally struck by a car while walking home from school. The same month, Dulaney student Nicholas W. Browning, 17, was sentenced to four life terms for killing his parents and brothers.
Family members disclosed funeral arrangements Tuesday evening. A viewing for Connor is scheduled on Thursday at the Lemmon Funeral Home from 2 p.m. to 4 p.m. and from 7 p.m. to 9 p.m, with a funeral at Dulaney Valley Memorial Gardens at 11 a.m. Friday. Kyle's viewing is on Friday at Lemmon from 3 p.m. to 5 p.m. and from 7 p.m. to 9 p.m. His funeral is on Saturday at 10 a.m., also at Dulaney Valley.
Baltimore Sun reporters Arin Gencer and Olivia Bobrowsky contributed to this article.
