Whereabouts of 15-year-old shooting suspect's parents remain unknown; US Marshals issue $10,000 reward

James and Jennifer Crumbley, parents of 15-year-old Ethan Crumbley, found Saturday after brief evasion

Police searching for James and Jennifer Crumbley, who bought gun and made it available to their son, resisted his removal from school despite evidence he planned killing spree

Shooter in town of Oxford surrenders to police in deadliest US school massacre so far this year; police seize semi-automatic handgun, no word on a motive

Nikolas Cruz admits to murdering 14 students and 3 staff members at Florida's Marjory Stoneman Douglas High School; victims' parents shrug off his apologies as a defense strategy

24 others hurt; student gunman wounded while being detained

The nine families suing the now-bankrupt Remington are considering the proposals; rifle was used to kill 20 first-graders and six educators

One suspect arrested, another reported killed; at least 12 hospitalized in 'terrorist' killing spree

No immediate details on number or condition of victims; police say Knoxville site has been secured and they are trying to reunite surviving students with their families

Florida community holds memorial services for 5 Jewish victims of attack that killed 17; members say they suffer from trauma, have stepped up security