A man shot a longtime companion dead in her Marietta home Sunday morning before going outside and killing himself in the middle of a cul-de-sac in a quiet Marietta neighborhood, police said.

“Our internal investigations are showing it was a murder-suicide,” said Marietta Police spokesman Officer David Baldwin.

Henry Harlan Wooten, 70, of Acworth, shot Kay Cornell Janus, 72, about 10 a.m. Sunday in the garage of her house in the 1500 block of Gateview Way, near the intersection of Scufflegrit and Allgood roads in northeast Marietta. Baldwin said Wooten, who was involved in a “long-term relationship” with Janus, then left the house and went to the other end of Gateview, about a block away, where he shot himself.

Though Baldwin said they were a “couple,” investigators had conflicting information on whether or not Wooten and Janus were married.

Baldwin said police didn’t know what led to the shooting.

“The investigators are deep into interviewing people,” he said.

Baldwin said he wanted to make clear that the shooting was an isolated domestic incident.

“Obviously, this was a very quiet, nice neighborhood,” he said. “We don’t want anybody to think this was a crime spree or somebody was on the loose.”

One neighbor, who asked that his name not be used, said he heard a gunshot coming from Janus’s home and walked outside, where he saw Wooten shoot himself near the truck Wooten owned. The neighbor said the couple had recently split up, and Wooten was dealing with health and financial problems.

The neighbor said he had never heard of any problems between the couple where police had to be called. He said he spoke with Wooten on Saturday.

“He was saying he was very tired with life, tired of being sick and he didn’t mind dying,” the neighbor said. “I told him, ‘Don’t talk that way,’ but I never thought that 24 hours later this would take place.”

The neighbor said Wooten had a concealed weapons permit and carried a gun in his truck, which the neighbor warned Wooten about.

“My feeling is a gun is ultimately going to cause more harm than good,” he said.

“Chances are you are going to use it against someone you know.”

Anyone with information on the shooting is asked to call Detective Michael Freer at (770) 794-5477.