NOPE
Can I kill someone
No, you cannot kill someone unless you're starring in a bad movie — and even then, no.
Killing someone is illegal and morally wrong almost everywhere on the planet. If you’re considering it, stop. There are consequences ranging from life in prison to permanent criminal infamy. The criminal justice system does not take 'I thought I could' as a valid excuse. Find a less homicidal hobby, like sudoku.
If you feel violent urges or thoughts, seek immediate help from mental health professionals or emergency services.