Duncan Lemp, 21, was asleep in his bedroom along with his girlfriend, when police executing a search warrant around for banned weapons opened fire on the home from outside 4.30am on Thursday.  

The Montgomery County Police Department said in a news release Friday that Lemp 'confronted' police and was shot by one of the officers early Thursday. Lemp was killed, and his girlfriend was injured.

Rene Sandler, an attorney for Lemp's relatives, said an eyewitness gave a 'completely contrary' account of the shooting. 

She said police could have 'absolutely no justification' for shooting Lemp based on what she has heard about the circumstances.

'The facts as I understand them from eyewitnesses are incredibly concerning,' she told The Associated Press.