The shooting deaths of a state district attorney and his wife over the weekend led authorities Sunday to consider any possible link to the death of another prosecutor who was gunned down earlier this year.

Kaufman County District Attorney Mike McLelland and his wife, Cynthia Woodward McLelland, were found shot dead on Saturday at their home near Forney, Texas, in a semirural county east of Dallas, according to law-enforcement officials.

The discovery of the deaths stunned residents in this close-knit community, which is still reeling from the murder of Assistant District Attorney Mark Hasse on Jan. 31, and has some state prosecutors worried about their own safety.

Mr. McLelland, 63 years old, and Mrs. McLelland, 65, had five children, including a son who is a Dallas police officer, according to a biography on the Kaufman County District Attorney’s Office website.