Victim-aware note: Seya was a young child. This file records the investigative and judicial facts without reproducing graphic forensic details. It uses the age reported in court coverage—five—while avoiding unsupported biographical detail.
The disappearance
Seya was reported missing from her family home in Kotadeniyawa on September 12, 2015. Relatives and police searched the area. She was found dead near the home on September 13.
Authorities determined that she had been abducted and sexually assaulted before being killed. Those findings are necessary to explain the charges and judgment, but the manner of injury is not described here.
Early investigation and wrongful suspicion
The first phase of the investigation was marked by serious errors. Police arrested a 17-year-old student and another man on suspicion. DNA testing did not connect them to the crime, and they were released.
The released suspects alleged that police mistreated them in custody. Police denied the allegations, and Sri Lanka's police leadership ordered an inquiry. These allegations are attributed rather than presented as adjudicated facts.
The episode matters because suspicion alone caused substantial harm. This archive does not repeat the names of cleared people as though they remained connected to the crime.
A confession that did not match the forensic evidence
Investigators later arrested Dinesh Priyashantha, who became widely known in news coverage by the alias “Kondaya.” Reports said he confessed, but his DNA did not match the biological evidence from the crime scene. He later retracted the confession and said his brother had influenced him to take responsibility.
The mismatch prevented the confession from being treated as the final solution. It also showed why corroboration was essential in a case already affected by wrongful suspicion.
DNA identification of Saman Jayalath
The investigation then focused on Priyashantha's brother, Saman Jayalath. Laboratory testing matched Jayalath's DNA to the crime-scene profile. Contemporary court reporting describes that match as the central forensic evidence linking him to Seya's abduction and death.
DNA played two distinct roles: it cleared people who had been arrested too early and supported the prosecution of the man ultimately convicted. The page does not describe DNA as infallible; it reports how the court and contemporaneous sources used the specific results.
Trial and conviction
Jayalath was indicted on four counts arising from the abduction, sexual assault and killing. The case was heard in the Negombo High Court.
On March 15, 2016, High Court Judge Champa Janaki Rajaratne found him guilty and imposed a death sentence for murder. Contemporary reporting also records a total of 60 years' imprisonment on the other counts.
This archive uses Solved / Adjudicated because the case produced a trial judgment identifying and convicting the perpetrator. It does not use the sentence to sensationalize the case or imply that Sri Lanka carried out an execution.
What the death sentence means
Sri Lankan courts continue to impose death sentences for murder, but the country has maintained a de facto moratorium on executions since 1976. Accordingly, a death judgment and an execution are not the same event.
No reliable source reviewed indicated that Jayalath was executed. The accurate current description is that he was convicted and sentenced to death, with additional custodial terms, while the national moratorium remained in place.
Investigative lessons
The case demonstrates the danger of treating an arrest or confession as proof. Several people were publicly associated with the killing before forensic testing excluded them. The later DNA match supported a very different prosecution.
It also illustrates why reporting should distinguish suspects, cleared individuals and convicted defendants. Only Saman Jayalath is presented here as the person convicted of the crimes against Seya.
Current status
The Negombo High Court judgment provides a clear adjudicated outcome. The public record reviewed did not reveal a later judgment overturning that conviction.
The status remains subject to correction if a reliable appellate ruling emerges. The absence of an identified execution is stated explicitly because Sri Lanka's sentencing law and long moratorium are often confused.
Frequently asked questions
Who was convicted?
Saman Jayalath was convicted by the Negombo High Court on March 15, 2016.
Were earlier suspects cleared?
Yes. DNA testing excluded earlier suspects, including a teenager and Dinesh Priyashantha.
Was DNA the only important evidence?
Contemporary reporting identifies the DNA match as central. This file does not claim access to the complete trial record or reduce the judgment to a single laboratory result.
Was Jayalath executed?
No execution was located. Sri Lanka has not carried out an execution since 1976 despite continuing to issue death sentences.
Source and status methodology
This file uses contemporaneous Sri Lankan court reporting, separate coverage of the DNA evidence and current reporting on the national death-penalty moratorium. Cleared suspects are not described as offenders, and custodial allegations are kept separate from established findings.
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