Police said 17-year-old Corey Johnson of Jupiter admitted to the stabbings, which took place in a Palm Beach Gardens home early Monday morning and resulted in the death of a boy four years younger, the station said.
Arriving officers found Eileen Simon and two 13-year-old boys — Jovanni Alexander Sierra and Dane Lucas Bancroft — with stab wounds just before 6 a.m., WPEC reported, adding that Jovanni died from a cut throat and multiple stab wounds.
Dane ran to protect his mom when Johnson stabbed him over 30 times, police told the station, adding that Dane and his mother ran to a neighbor’s house where they called 911.
A third juvenile, Kyle Bancroft — who was found unharmed in the home — told investigators he and Johnson often watched videos about Muslim jihadis on the internet, most recently the Sunday before the attack, the station reported.
Among the terrorist clips Johnson watched were beheading videos, the station said, citing a newly released report from Jupiter police.