Solve the following sql problem:
What is the most common type of weapon that causes death?

Schema:
SCHEMA:
- Table: incidents
  - Column: case_number
    - Samples: [031347-2015, 072458-2016, 089985-2016, 1004453N, 100577T]
  - Column: date
    - Samples: [2015/2/9, 2016/3/26, 2016/4/16, 2004/12/29, 2007/2/12]
  - Column: location
    - Samples: [7400 Bonnie View Road, 8218 Willoughby Boulevard, 4800 Columbia Ave, 2400 Walnut Hill Lane, 3847 Timberglen Road, #3116]
  - Column: subject_statuses
    - Samples: [Deceased, Shoot and Miss, Shoot and Miss, Shoot and Miss, Deceased]
  - Column: subject_weapon
    - Samples: [Vehicle, Shotgun, Handgun, Vehicle, Handgun]
  - Column: subjects
    - Samples: [Luster, Desmond Dwayne B/M, Gilstrap, Bryan B/M, Unknown L/M, Evans, Jerry W/M, Mims, Carlton B/M]
  - Column: subject_count
    - Samples: [1, 1, 1, 1, 1]
  - Column: officers
    - Samples: [Tollerton, Aaron W/M, Cardenas, Steven L/M, Ruben, Fredirick W/M, Nguyen, Buu A/M, Ragsdale, Barry W/M]
- Table: officers
  - Column: case_number
    - Samples: [44523A, 44523A, 121982X, 605484T, 384832T]
  - Column: race
    - Samples: [L, W, L, W, B]
  - Column: gender
    - Samples: [M, M, M, M, M]
  - Column: last_name
    - Samples: [Patino, Fillingim, Padilla, Poston, Mondy]
  - Column: first_name
    - Samples: [Michael, Brian, Gilbert, Jerry, Michael]
  - Column: full_name
    - Samples: [Patino, Michael, Fillingim, Brian, Padilla, Gilbert, Poston, Jerry, Mondy, Michael]
- Table: subjects
  - Column: case_number
    - Samples: [44523A, 121982X, 605484T, 384832T, 384832T]
  - Column: race
    - Samples: [L, L, L, B, B]
  - Column: gender
    - Samples: [M, M, M, M, M]
  - Column: last_name
    - Samples: [Curry, Chavez, Salinas, Smith, Dews]
  - Column: first_name
    - Samples: [James, Gabriel, Nick, James, Antonio]
  - Column: full_name
    - Samples: [Curry, James, Chavez, Gabriel, Salinas, Nick, Smith, James, Dews, Antonio]

SELECT subject_weapon FROM incidents WHERE subject_statuses = 'Deceased' GROUP BY subject_weapon ORDER BY COUNT(case_number) DESC LIMIT 1