I am looking for a verb to describe the action of a good guy becoming a bad guy. There is a word for it in my mother language, but I am not sure if there is a word for it in English.

The verb, which could be literally translated as 'become bad, turned into a bad guy'. an example would be:

He used to be a good cop, but now he___, mingles with the gangsta on the street, sad thing.

update: thanks everyone for your answers and comments. it seems a word to describe this behavior of people working in law enforcement is unanimous, but a word to describe this behavior that includes ordinary folk remains controversial.

I am looking for a verb to describe the action of a good guy becoming a bad guy. There is a word for it in my mother language, but I am not sure if there is a word for it in English.

The verb, which could be literally translated as 'become bad, turned into a bad guy'. an example would be:

He used to be a good cop, but now he___, mingles with the gangsta on the street, sad thing.

update: thanks everyone for your answers and comments. it seems a word to describe this behavior of people working in law enforcement is unanimous, but a word to describe this behavior that includes ordinary folk seems remains controversial.

I am looking for a verb to describe the action of a good guy becoming a bad guy. There is a word for it in my mother language, but I am not sure if there is a word for it in English.

The verb, which could be literally translated as 'become bad, turned into a bad guy'. an example would be:

He used to be a good cop, but now he___, mingles with the gangsta on the street, sad thing.

Also, if there is a word to describe a good guy becoming a bad guy, is there a word to describe a bad guy changing to a good guy?

I am looking for a verb to describe the action of a good guy becoming a bad guy. There is a word for it in my mother language, but I am not sure if there is a word for it in English.

The verb, which could be literally translated as 'become bad, turned into a bad guy'. an example would be:

He used to be a good cop, but now he___, mingles with the gangsta on the street, sad thing.

update: thanks everyone for your answers and comments. it seems a word to describe this behavior of people working in law enforcement is unanimous, but a word to describe this behavior that includes ordinary folk remains controversial.

I am looking for a verb to say the action of a good guy becoming a bad guy, there is a word to say it in my mother language, but I am not sure if there is a word to say it in English.

The verb, which could be literally translated as 'become bad, turned into bad(guy)'. an example would be:

He used to be a good cop, but now he___, mingles with the gangsta on the street, sad thing.

Also, if there is a word to say good guy become bad guy, is there a word to say a bad guy change to a good guy? thanks.

I am looking for a verb to describe the action of a good guy becoming a bad guy. There is a word for it in my mother language, but I am not sure if there is a word for it in English.

The verb, which could be literally translated as 'become bad, turned into a bad guy'. an example would be:

He used to be a good cop, but now he___, mingles with the gangsta on the street, sad thing.

Also, if there is a word to describe a good guy becoming a bad guy, is there a word to describe a bad guy changing to a good guy?