Law & Order: Special Victims Unit S07E07 - Name

When construction workers pour the sand into a newly made playground and discover the remains of a young boy, Detective Stabler teams up with CSU tech Millie Vizcarrondo to investigate,which leads them to resurrect a cold case where four boys disappeared 30 years earlier. As the investigation unfolds, new forensic evidence surfaces but no progress can be made solving this case until Anna surfaces, claiming her stepfather Robert Sawyer was the killer.