The three arrested teens were identified as Brandon Conrad, 14, of the 4600 block of Oakmont Street; Malik Page, 16, of the 4700 block of Oakmont Street; and Emmanuel Harris, 17, of the 4400 block of Shelmire Street, all in Holmesburg. A fourth person was present during the attack but won't be charged, according to Homicide Capt. Jack Ryan, who declined to elaborate on that person's involvement.