Police car lightsThe mother of an eastern Iowa teenager charged with murder now faces charges of her own in the case.

Cedar Rapids Police arrested 39-year-old Saresa Keith on Thursday on charges of child endangerment, carrying weapons and assault while using or displaying a weapon. Her son, 16-year-old Kenyauta Keith, is accused of shooting and killing 21-year-old Brandon Johnson on March 19.

Keith is also charged with attempted murder for wounding a 16-year-old boy. Police say Saresa Keith took her son to a prearranged fight that escalated into the gunfire. In addition, officers says she carried a stun gun and used it during the fight.