"major perpetrator" is correct and usable in written English.
It is a phrase used to describe a person or group that has done something particularly wrong or unlawful and is deserving of serious punishment. For example, "The police are searching for the major perpetrator of the crime."
Mr MacEoin argued that extremist literature was widely available in British mosques and shops adjoining them, that much of it was funded by the Saudi Arabian government, and that the Finsbury Park mosque was a major perpetrator of such distribution.
When it comes to cyber-espionage, the government of China is a "major perpetrator", Wayne Morrison wrote in a March report about China-US trade issues that was prepared for members of the US Congress.
The party has been accused of political violence, and "was widely viewed as the major perpetrator of targeted killings," according to a 2012 Human Rights Watch report.
Her questioning during the argument took note of Congressional findings that states were major perpetrators of bias against the disabled.
"The ruling party members were the major perpetrators in violations linked to distribution of food, agricultural inputs and other forms of aid," said Mugwadi.
In an editorial on the eve of the visit, the paper accused Japan of "trying to portray Japan as the victim of world war two rather than one of its major perpetrators".
The evidence suggests that the major perpetrators of televised liberal bias do not see their views as biased.
It says it won't get more specific by, say, listing the IP addresses of major perpetrators of click fraud because it would end up aiding fraudsters.
The other major perpetrators were partners (14%), other FSWs (12%), and husbands (9%).
From the results of our study it appeared that the police were the major perpetrators.
According to research on elder abuse carried out by Soeda & Araki [ 26], major perpetrators in Japan tend to be daughters-in-law (30 to 40%).
