Documents show a former Florida Department of Law Enforcement crime lab analyst told investigators he had problems with his back and knew he was in trouble when confronted about hundreds of narcotics pills missing from sealed evidence containers.

The information comes from an affidavit released Wednesday morning detailing the evidence against Joseph Graves. Graves was released from the Escambia County Jail late Tuesday on a $290,000 bond hours after his arrest on charges of grand theft, tampering with evidence and drug trafficking.

Investigators are reviewing about 2,600 cases from around the state processed by Graves at the Pensacola lab. Prosecutors allege Graves stole the narcotics after replacing them with over-the-counter allergy, aspirin, laxatives and homeopathic pills. Experts say the allegations of evidence tampering could create a massive headache for Florida courts.