A Saugus teenager pleaded guilty Monday to sharing a video on the social network Snapchat that showed the sexual assault of an intoxicated 16-year-old girl.
Timothy Cyckowski, 19, admitted to his role in the 2014 case during an appearance in Lynn Juvenile Court, according to the Essex district attorney’s office. He had been accused of recording the attack.
Judge Michael Edgerton ordered Cyckowski committed to the custody of the Department of Youth Services until he turns 20, when he will be placed on probation for four years.
Two other Saugus residents are accused in the case and are scheduled for trial May. 2 Rashad Deihim, 21, and Kailyn Bonia, 20, are both charged with kidnapping, posing a child in the nude, assault to rape, and indecent assault and battery.
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The alleged assault took place behind Waybright Elementary School in Saugus on Sept. 3, 2014.
Authorities learned about the incident after another 16-year-old girl received four Snapchat videos of the encounter from Cyckowski. The girl informed her parents, who told police.
Prosecutors have said the victim could not speak or stand up and had injuries from her neck down.
Cyckowski pleaded guilty to posing a child in the nude, dissemination of obscene material, and kidnapping. His father Matthew, 39, is charged with misleading police and is scheduled to go on trial May 17.
Andy Rosen can be reached at andrew.rosen@globe.com. Follow him on Twitter @andyrosen.