Deseret News Share this story Adobe Stock image EAGLE MOUNTAIN — A fifth person has been arrested in connection with a possible retaliation attack involving multiple shots fired inside an Eagle Mountain home occupied by a couple and their 12-year-old son. Irwin Aldair Perez-Barrera, 18, of Provo, was booked into the Utah County Jail on Wednesday for investigation of three counts of aggravated assault and 11 counts of felony discharge of a firearm. Irwin Aldair Perez-Barrera, 18, of Provo, was booked into the Utah County Jail on Wednesday, Dec. 9, 2020, for investigation of three counts of aggravated assault and 11 counts of felony discharge of a firearm.