Heyl, Royster, Voelker & Allen P.C. promoted associates Jessica M. Bell, James R. Grabowski, Nathan M. Henderson and Tyler J. Pratt to partner.Bell focuses her practice on the defense of insurance clients and employers in workers' compensation matters.Grabowski has experience in the defense of toxic tort matters and complex business litigation.Henderson focuses his practice on toxic tort litigation with an emphasis on asbestos-related products liability and premises liability actions.Pratt focuses …