The girl, who admitted violent disorder, also stole a pack of soft drinks and cash from the shop till.
Det Insp Paula Jones said: “We continue to remain steadfast in our investigation to identify more people who attended the disorder in Merseyside by reviewing more than 12,000 pieces of footage, and we will not stop until we’ve put everyone we possibly can before the courts.”
Riots broke out after three young girls were killed in a knife attack at a children’s dance event in Southport in July, fuelled by subsequent misinformation the suspect was an asylum seeker.
Merseyside Police said the total number of people arrested for disorder in Merseyside now stands at 151, with 110 charged and 84 sentenced to a combined 176 years.
