A former security operations manager for eBay Inc. was sentenced to 18 months in pri

son Tuesday for his role in an extensive campaign to terrorize and intimidate the editor and publisher of an online newsletter.

Philip Cooke pleaded guilty in October to conspiracy to commit cyberstalking and conspiracy to tamper with witnesses for his part in the scheme slot wallet targeting a Massachusetts couple who published an online newsletter critical of the online auction site.

Authorities say Cooke, who was senior manager of Security Operations for eBay's Global Security Team, conspired with other employees to terrorize the couple because company executives were upset about an article about a lawsuit filed by eBay accusing Amazon of poaching its sellers.

Several other former eBay workers have also pleaded guilty in the scheme, which prosecutors say included sending threatening online messages as well as disturbing deliveries — like live roaches and a ?unera? wreath — to the couple's home.

Prosecutors say Cooke, a retired Santa Clara, California, police captain, attended a meeting at eBay headquarters, where the employees plotted sending harassing anonymous messages to one of the victims over Twitter. They say Cooke also tried to obstruct police's investigation into the scheme.