EAST WINDSOR — Police have arrested an Enfield woman on sixth-degree larceny charges for allegedly stealing beer from a Hartford Distributors truck, police said.

Christy A. Quail, 33, of 13 Burnham St., was captured on video surveillance recorded by a private investigator hired by Hartford Distributors to follow Omar Thornton after he was suspected of stealing from the company. Thornton gave beer from his truck to Quail in East Windsor, authorities said.

Thornton, 34, was confronted with the evidence of his theft Tuesday morning and agreed to resign his position. A moment later he pulled out two Ruger SR9 9mm pistols and opened fire on his co-workers, killing eight and wounding two. He later killed himself as police closed in.

East Windsor police Chief Edward J. DeMarco Jr. said East Windsor police worked with Manchester police in the investigation, and said more arrests are expected.

Manchester police Lt. Christopher Davis said his department turned over to East Windsor information it received from Hartford Distributors, which included surveillance footage of Thornton taking beer from his truck and giving it to third parties.