Edgar was announced the best student by Education Minister Mutula Kilonzo while announcing the results for KCSE 2012.
Edgar is followed closely by Oliver Kiayie of Maranda High School while Borona Victor Koome, Abdalla Hamza Yusuf, and Elkana Nyang'ari Omare completed the top five performers' list.
The leading female student Abdulkarim Tasneem Hasham from Sheikh Khalifa High School in Mombasa emerged sixth countrywide.
On the schools' performance level, Moi High Kabarak took the lead followed by Alliance High School, Mary Mother of Grace High School, Strathmore School and Kenya High School in that order.
The top 10 counties in order of merit are Samburu, West Pokot, Elgeyo Marakwet, Siaya, Embu, Tranz Nzoia, Bomet, Nandi, Uasin Gishu and Kisumu.
Over 123,000 students out of the 437,762 students who sat for the KCSE examinations last year attained an average grade of C+ and above.
Minister Mutula released the KCSE results of the class of 2012 on Friday, almost a month earlier than expected.
The KCSE results were expected to be announced on 25th March.
Mutula noted that there were more male candidates than female candidates in all counties except the Meru and Tharaka-Nithi Counties.
Mutula stated that even though 88 people including 16 teachers had been arrested over exam irregularities, there was a 41.92% decrease in those involved in irregularities.
"Cheating is no longer an option during National exams," warned Mutula.
He said that last year's candidates performed better than those in 2011, with 1,975 attaining the A grade against 1,930 in 2011.
Mutula was pleased to note that the teachers strike threat last week was averted by the Kenya National Union of Teachers (KNUT) saying that nobody should go on strike during the national exams.
He added that in his term as Minister for Education in the last 10 months, there was no scandal reported.
Candidates can now access their results by sending their index numbers to the short code 5052.
By Maureen Murimi.