Second ricin suspect Everett Dutschke due in court 29 April 2013 Last updated at 15:03 A Mississippi martial arts instructor is due in court on charges relating to ricin-laced letters that were sent to President Obama, a senator and a judge. James Everett Dutschke, 41, has been charged with possessing a biological agent with intent to use as a weapon. He was detained on Sunday, days after police arrested and then released another man, Paul Kevin Curtis. Investigators, some in hazardous materials suits, searched Mr Dutschke's home, business and vehicles. The Tupelo man had reportedly been under surveillance. First suspect framed? According to an FBI news release, Mr Dutschke has been charged with "knowingly developing, producing, stockpiling, transferring, acquiring, retaining and possessing a biological agent, toxin and delivery system, for use as a weapon, to wit: ricin." A lawyer for Mr Dutschke said her client was co-operating with the authorities. If convicted, he could face up to life in prison. The letters were sent to the president, Mississippi Senator Roger Wicker and Judge Sadie Holland on 8 April. On 17 April, authorities arrested Mr Curtis, a 45-year-old local Elvis impersonator. But Mr Curtis was released from jail and charges were dropped six days later. No evidence of ricin was found in FBI searches of Mr Curtis' home. Mr Curtis, who said he had been framed, often ended posts on his Facebook page in a similar manner. Mr Dutschke and Mr Curtis reportedly knew each other, and Mr Curtis said the two men had discussed publishing a book on an alleged conspiracy Mr Curtis believed he had discovered, to sell body parts on the black market. But the pair later fell out. Authorities began investigating Mr Dutschke after Mr Curtis' defence lawyers gave them a list of people they thought might have a reason to hurt their client.