Overview

• Shane Parrish Killian, 54, is in custody for allegedly killing his wife, son, and in-laws.
• The shooting occurred at the family's home in Alameda on Wednesday night.
• Police discovered multiple firearms at the scene and have not yet determined a motive.
• The suspect's 1-year-old son was also injured and remains in critical condition.
• This incident marks one of the largest mass killings in Alameda's recent history.