A jury in Atlanta says a man who shot a father in a daycare center parking lot is guilty of murder "beyond a reasonable doubt, but is mentally ill."

Hemy Neuman's lawyer had tried to convince the jury that their client was insane, when he killed Russell Sneiderman in November 2010.

But police said when Neuman shot Sneiderman multiple times after dropping off his then two-year-old son at Dunwoody Prep, it was a "cold and calculated murder."

During his trial, Neuman's lawyers implicated the victim's wife in the fatal shooting.

Both prosecutors and the defense insinuated that Neuman and Andrea Sneiderman were having an affair.

On the witness stand, Andrea Sneiderman denied that.

She has not been charged with any crime. 

Neuman was sentenced to life in prison without the possibility of parole.