ORLANDO - The former neighborhood watch volunteer who killed Trayvon Martin told his wife to buy bulletproof vests for them and for his lawyer, according to jailhouse calls released Monday.

“As uncomfortable as it is, I want you wearing one,’’ George Zimmerman told his wife. His attorney, Mark O’Mara, has reported receiving threats.

The calls, released by prosecutors, also detail how Zimmerman instructed his wife to transfer money from bank accounts. The recordings could play a crucial role in his second bond hearing next week.

Zimmerman was released on $150,000 bond in April, several days after the calls took place. At his bond hearing, his wife, Shellie, testified that she didn’t know how much money had been raised from a website created for his legal defense. She also testified that they had limited funds because she was in nursing school full time and Zimmerman wasn’t working.

Prosecutors say the calls show George and Shellie Zimmerman knew that roughly $135,000 had been raised by the site. The judge in the case revoked George Zimmerman’s bond and ruled the couple had deceived the court.

Shellie Zimmerman was arrested last week on a perjury charge and released from jail after posting bond.

Her 28-year-old husband is charged with second-degree murder and has pleaded not guilty, claiming self-defense during the confrontation with the 17-year-old Martin.