The Mastic man accused of killing his ex-girlfriend was officially charged with her murder Wednesday.

Police say Guenter Wende, 42, killed 25-year-old Laura Pizzini after she broke up with him. Her body was found in her Mastic apartment on Oct. 16.

Prosecutors say Wende was obsessed with Pizzini and showed up at her apartment that night looking to rekindle their relationship but she rejected him. Investigators say Wende stabbed her with a hunting knife he had brought.

Wende's attorney says his client is innocent and that his confession to cops was coerced with physical violence.

Wende is being held without bond.

To watch an interview with Pizzini's parents, go to Channel 612 on your iO digital cable box and select iO Extra.