Colt Gray, the suspect in the Apalachee High School shooting that killed four people, is under investigation for possible connections to past mass shootings, including the Sandy Hook and Parkland tragedies. Authorities discovered writings in Gray's room referencing the Parkland massacre and received tips about threats he allegedly made on Discord, where he used a profile linked to the Sandy Hook shooter. Despite being questioned in 2023 regarding these threats, Gray denied any involvement and claimed he had no access to a Discord account at the time. His father, Colin Gray, has been charged for allowing Colt access to an AR-15 used in the shooting, raising concerns about parental responsibility regarding firearm access. President Biden criticized the lack of gun safety in the home, emphasizing the need for accountability among parents. The investigation continues as the community grapples with the tragedy.