RIVERHEAD - ? The man accused of murdering a woman and leaving her body in a Riverhead shopping center has pleaded not guilty.

Guillermo Alvarado Ajcuc was arraigned on murder charges and held without bail today. Police say the 21-year-old killed Mirian Garcia. Garcia?s body was discovered in a parking lot on Old County Road earlier this month.

Police have not revealed exactly how Garcia died.

Man accused of killing woman found in Riverhead shopping center