India, Sept. 21 -- In a terrifying mugshot, the alleged shooter who is suspected of killing a wedding guest while on a spree at a country club in New Hampshire seems stony-faced.

After reportedly shooting and killing Robert DeCesare, 59, during a shooting at the Sky Meadow Country Club on Saturday night, Hunter Nadeau, 23, of Nashua, is now facing second-degree murder charges, according to WMUR.

"Additional charges likely will be brought, including for the additional shooting victims," New Hampshire Attorney General John Formella and Nashua Police Chief Kevin Rourke said in a statement. They stated that they anticipate Nadeau's arraignment on Monday before the Ninth Circuit Court in Nashua.

Authorities claim Nadeau invaded the premises...