The "lenient" sentence of a Croydon man convicted of smashing a car window with a large "zombie" knife will be reviewed in the court of appeal later this month.
Joshua Gardner, 18, was filmed attacking a car in broad daylight on London Road, West Croydon, forcing the vehicle's driver to flee on foot.
Mayor Sadiq Khan referred the two year suspended sentence to the attorney general's office for being "unduly lenient" following a public outcry.
Gardner's case will be heard on January 30 at the Royal Courts of Justice.
Judge Anuja Dhir QC's sentence, handed down in November, was criticised by a number of prominent figures in the police force for failing to protect the public.
The judge cited a number of mitigating factors when explaining the suspension of sentence, such as that Gardner had already spent six months in custody since his arrest in May and that he had a good chance of rehabilitation.
Gardner, of London Road, was also given a nine month curfew and was ordered to carry out 150 hours of unpaid work.
The Court of Appeal may decide to keep the sentence the same, increase it or issue guidance for future cases.
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