[SolidWood]

He says the bullet left no exit wound, but gives the impression she was shot at close range.

What's an "impression"?

BTW a handgun bullet fired from certain distance won't have to leave the body. Nothing unusual about that.

[ScreamingFist]

BTW a handgun bullet fired from certain distance won't have to leave the body.

Either small caliber or a large caliber with a frangible bullet, like a Glaser Safety Slug.

[668 - Neighbor of the Beast]

For the definition of “impression,” please see dictionary.com.

As to the bullet, he speculates it exploded in her chest. It killed her in one minute. Close range, no exit wound. Impossible, no. Unusual? YMMV.