Answer
If a Muslim was shot or attacked without a justifiable Shar’ee reason,
and died without benefiting from any worldly cause, viz. medication,
treatment, hospitalisation, food, drink, etc., then he will be regarded as a
Shaheed (martyr) in his burial proceedings. He will remain in his soiled
clothes and there will be no Ghusal and Masnoon Kafan given. However,
Janaaza Salaat will be made. (Raddul Mukhtar vol.2 Pg.250; H..M. Saeed)
From Al Mahmood 10