We lawyers always seek more than what is warranted by the evidence.
It's a compulsive negotiating strategy.
In this case, it might work, because most reasonable people feel that this kid should never have been there with a weapon like that.
Funny thing is... this judge has a reputation for tough sentencing after conviction.
Link: https://www.msn.com/en-us/news/us/prosecutors-want-jury-to-consider-lesser-charges-in-u-s-teen-rittenhouse-s-murder-trial/ar-AAQARKF?ocid=msedgntp