with / by a knife

[English4everyone]

Is number one correct only?
1) He was killed with a knife.
2) He was killed by a knife.

[5jj]

Is only number one correct only?
1) He was killed with a knife.
2) He was killed by a knife.

Yes, though you will hear/see it. He was killed by the person who used the knife.

[English4everyone]

Thanks 5jj.
But you changed the position of "only" from the end of the sentence to the beginning. Do you mean it is wrong to put it at the end? I saw some examples with "only" at the end of the sentence? How do you justify this?

[bhaisahab]

Thanks 5jj.
But you changed the position of "only" from the end of the sentence to the beginning. Do you mean it is wrong to put it at the end? I saw some examples with "only" at the end of the sentence? How do you justify this?

In most dialects "only" at the end is wrong, a notable exception being Indian English.