Lubbock police are searching for a 30-year-old man they believed shot and killed another man Tuesday night after an argument at an East Lubbock convenience store.

Police investigators obtained an arrest warrant for Arthur Manahan late Wednesday morning in connection with the slaying of 21-year-old Ashaundre Grimes at the 7-Eleven convenience store in the 2500 block of Parkway Drive, according to a Lubbock police news release.

Manahan is described as a black man weighing about 130 pounds and is about 6 feet, 1 inch tall, the release states. He has multiple tattoos including a teardrop under his left eye and the word “Loyal” on the right side of his face and the dates "5-12-80/3-22-02." A tattoo across the front of his neck reads "On my own."

Lubbock police responded to a 9:30 p.m. shots fired call at the store and found Grimes suffering from a gunshot wound. He was taken to University Medical Center where he died.

Witnesses at the scene identified Manahan as the shooter, according to the warrant.

The man who accompanied Grimes reportedly told investigators that Grimes drove them to the store and parked next to the vehicle where the shooter sat in the front passenger seat. The man said he didn't know the shooter who he described as having "a lot of tattoos on his face," but said he has seen him before. However, he identified Manahan as the shooter through a photo lineup, the warrant states.

He said Grimes exited the vehicle and walked over to the other vehicle and spoke with Manahan. However, he said he could not hear the conversation and Grimes returned saying he wanted to leave because Manahan was “Tripping.”

The man said he entered the store to buy food. As he was entering the store, he said Manahan said something to him but he “defused” the situation. He told investigators he could see Manahan was armed with a black handgun.

While in the store, the man said he heard gunshots and went outside to see Grimes suffering from a gunshot wound.

Security camera video footage reportedly showed Grimes arriving at the 7-Eleven and parking in front of the store next to a GMC Envoy. Grimes appeared to be speaking with the occupants of the Envoy and Grimes' passenger exits their vehicle and enters the store.

The video showed the Envoy reverse behind Grimes’ vehicle to block it then pull forward out of camera view. At that point, Grimes appears to have been shot at. The Envoy re-appears in the video as it leaves the scene and the right front passenger can be seen leaning out of the window, looking back at Grimes, the warrant states.

Anyone with information on Manahan's whereabouts can Crime Line at (806) 741-1000. Callers may remain anonymous and may be eligible for a cash reward.