A pipeline replica sign in Cushing, Okla., in 2015. Daniel Acker/Bloomberg via Getty Images hide caption
Tulsa, Okla., police Officer Betty Shelby, seen here in an undated official photo, is being charged with first-degree manslaughter in the death of Terence Crutcher. AP hide caption
Terence Crutcher was shot and killed by police in Tulsa., Okla., on Friday, in a case that has prompted a Justice Department investigation. Tulsa Police hide caption
Herman "Dub" Tolbert, shown inside an American Legion post in Bokoshe, Okla., says the community is left exposed and he's determined to make regulators listen. Joe Wertz/StateImpact Oklahoma hide caption
Oklahoma Gov. Mary Fallin walks on the floor of the Oklahoma House on Wednesday. On Friday, Fallin vetoed legislation that would make it a felony for doctors to perform an abortion. Sue Ogrocki/AP hide caption
Robert Bates arrives for his arraignment at the Tulsa County Courthouse in Tulsa, Okla., on April 21, 2015. Bates has been convicted of second-degree manslaughter. Sue Ogrocki/AP hide caption
Volunteer firefighters from the Dewey County Task Force work a blaze southwest from Freedom, Okla., on Tuesday. Landon Cates/AP hide caption
Oklahoma's Buddy Hield celebrates the Sooners' 77-63 win over Texas A&M in the third round of the NCAA tournament. Harry How/Getty Images hide caption
After a magnitude-4.5 earthquake was recorded near Cushing in October, Oklahoma regulators ordered oil companies to shut down several disposal wells. That seemed to slow the shaking — at least for a while. Joe Wertz/StateImpact Oklahoma hide caption
This 2011 photo provided by the Oklahoma Department of Corrections shows Charles Warner. Warner was executed Thursday for the 1997 killing of his roommate's 11-month-old daughter. AP hide caption
Gary Matli, a field supervisor with the Oklahoma Corporation Commission, inspects a disposal well located east of Guthrie, Okla. Joe Wertz/StateImpact Oklahoma hide caption
Faced With Spate Of Tremors, Oklahoma Looks To Shake Up Its Oil Regulations
This undated file photo provided by the Oklahoma Department of Corrections shows death row inmate Richard Glossip. AP hide caption
A truckload of seed wheat and rye awaits planting near Orlando, Okla., back in 2012, when the price per bushel of wheat was 50 percent higher than it is now. Sue Ogrocki/AP hide caption
Flood waters from the Brazos River encroach upon a home in the Horseshoe Bend neighborhood in Weatherford, Texas, on Friday. Brandon Wade/AP hide caption