A Republican candidate who ran unsuccessfully for Congress in Nevada in 2020 with the backing of President Donald J. Trump surrendered to the police on Wednesday after he was charged with killing a man in Las Vegas last year, his lawyers said.

The Las Vegas police issued an arrest warrant earlier on Wednesday for the former candidate, Daniel Rodimer, 45, a onetime professional wrestler, after he was charged with murdering Christopher Tapp, 47, at a resort on the Las Vegas Strip on Oct. 29.

Medical workers found Mr. Tapp “suffering from injuries as a result of a purported accident,” and took him to a hospital where he was pronounced dead, the Las Vegas Metropolitan Police Department said in a statement.

Homicide detectives learned that Mr. Tapp had been in “an altercation inside a room” at the resort, the statement said. The Clark County medical examiner’s office ruled that Mr. Tapp died as a result of blunt-force trauma to the head.

A criminal complaint accuses Mr. Rodimer of striking Mr. Tapp on the head and says the killing was “willful, deliberate and premeditated.”

Mr. Rodimer’s lawyers, David Chesnoff and Richard Schonfeld, said in a statement that Mr. Rodimer had “voluntarily surrendered, posted bond and intends to vigorously defend the case.”