The Board of Examiners for Nursing disciplined three nurses and one former nurse last week for cases involving drug use, theft, deceit and mental illness. After a hearing last Wednesday, the board voted to revoke the registered nurse license of Ryan Buynicki of Agawam, Massachusetts, who, records show, stole Dilaudid in 2015 while working at Osborn Correctional Center in Somers. Buynicki also stole controlled substances from five patients in the prison infirmary in 2015 and falsified controlled substance records, according to the statement of charges against him by the state Department of Public Health. The board also found that his use of controlled substances was affecting his ability to practice a nurse, the statement said. The board issued a cease and desist order against Lisa Piatak of Shelton to stop practicing nursing without a license.