Authorities have arrested three people in last week’s fatal shooting at the Chalet Motel in Council Bluffs. 22-year old Joshua Dogsoldier was killed in a robbery that turned into a gunfight. Council Bluffs Police Sergeant Jerry Mann says three men and a 17-year girl are charged.Brenda Harmon of Glenwood, Iowa and 29-year old Thomas Keith of Crescent, Iowa both are charged with first-degree murder and first-degree robbery. 21-year old Aaron Lassek was charged with first-degree murder and attempted murder.Police say drugs were involved in the robbery and shooting.