A man is on trial in Pennsylvania for allegedly killing his ex-girlfriend mere minutes after she broke up with him, using that time to research how to shoot a gun, authorities say.

Michael Dutkiewicz, 26, stands charged with first-degree murder , third-degree murder and possessing an instrument of crime in the death of 25-year-old Alyssa Wiest. The alleged crime occurred in May, but as the Montgomery County courtroom filled up this week and prosecutors presented their case, more details into the harrowing incident came to light.

Dutkiewicz and Wiest had been dating for two years when, on the night of May 17, they were out at a bar drinking, prosecutors said, per Philadelphia-based Fox affiliate WTXF . At some point, they returned home — and Wiest delivered some news that would prove shoc

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