A New Hampshire man charged with attempted murder after opening fire in a church during a wedding ceremony earlier this month was charged Monday with assault after prosecutors say he attacked his own attorney.

Dale Holloway, 37, is facing an additional charge of assault in the first degree following an incident involving his court-appointed attorney at the Hillsborough County House of Corrections.

According to a press release from the office of New Hampshire Attorney General Gordon J. MacDonald, Michael Davidow suffered “a serious head injury” after his client, Holloway, inflicted “serious bodily injury.”