A police officer in the small Texas town where Sandra Bland was pulled over and jailed says the county's top prosecutors threatened to end his career if he came forward with what he says is evidence of wrongdoing.

Prosecutors strongly deny the allegations Michael Kelley made this week.

Kelley says trooper Brian Encinia was on the phone with a supervisor last July after arresting Sandra Bland because he didn't know what charge she should face.

Encinia was indicted for perjury, but Kelley says he and others should have faced more charges.

Prosecutors say Kelley is only coming forward to distract from his own indictment in a separate use-of-force case.

But Kelley's allegations are the latest to raise the idea that authorities haven't thoroughly investigated Bland's death.