TULALIP — Detectives are investigating a shooting at a Walmart parking lot on the Tulalip Reservation Sept. 30 that sent one man to the hospital on his 29th birthday.

The man was treated for a gunshot wound to the shoulder at Providence Regional Medical Center Everett before being booked into the Snohomish County Jail for investigation of robbery and a parole violation Oct. 1.

His accomplice, 21, was booked into the Snohomish County Jail for investigation of robbery and theft. The men are accused of stealing two ounces of marijuana from a Tulalip man at gunpoint.

That man, 23, said the men hit him in the face with a handgun and shot out his front passenger-side window. He fired back with his own gun, and said his actions were self-defense, court records say.

The Tulalip man told detectives that he sells medical marijuana and had taken out an ad on Craigslist.