Bonsoir ☺
1) Yes, the police will investigate this crime because it is theft and violation of another person.
2) To investigate and be able to catch the thieves, the police will have to base themselves, not on the crime but on the aim and the reason of the crime and they will also have to find the consequences of the crime as well as all the people whose crime is in their favor and those whose crime affects them. If they find this information, they can probably find the thieves and have them punished according to their actions.
3) If the two girls are arrested, they will be charged with theft and infringement of the domain of another.
4) According to me with the theft and the offense, depending on their age these girls will be jailed for about 15 years or more.
