(Roseville, MN)  —  A 17-year-old is behind bars for allegedly killing one family member and injuring four others in Roseville.  Police say the teenager attacked his relatives with an unknown weapon at a home on the eleven-hundred block of Ryan Avenue yesterday.  The suspect was taken into custody following a widespread shelter-in-place alert that accidentally went out to thousands of people in the Twin Cities metro area.  Police said the alert was only meant for residents in a small section of Roseville.