The latest on the trial of Raymond "Shrimp Boy" Chow. (All times local):

11:15 a.m.

Closing arguments are underway in the trial of a key defendant in a San Francisco Chinatown organized crime probe that also ensnared a state senator.

Raymond "Shrimp Boy" Chow is charged with racketeering and murder.

The district court room was packed Monday as Assistant U.S. Attorney Susan Badger painted Chow as a cold-blooded killer and skilled liar.

Prosecutors say Chow took over a Chinese fraternal group after having its previous leader killed and ran an enterprise that engaged in drug trafficking, money laundering and sales of stolen cigarettes and alcohol. He is also accused of a second killing.

J. Tony Serra, Chow's lead attorney, is scheduled to give his closing argument later.

The probe led to the indictment of more than two dozen people in 2014 and the subsequent racketeering conviction of state Sen. Leland Yee.