An investigative journalist who was among the first to raise concerns about the injuries suffered by suspected murder victim Katie Simpson before her death believes she was later placed under PSNI surveillance.

A police ombudsman investigation has found that PSNI inquiries into the death of showjumper Katie Simpson was failed and flawed.

The Police Service of Northern Ireland (PSNI) has said it was not "rigorous enough" when investigating the death of showjumper Katie Simpson. "We did not act quickly enough in responding to some of the concerns that were raised around Katie's death," added Ass Chief Con Davy Beck.

The PSNI has acknowledged deficiencies in its investigation into the murder of 21-year-old showjumper Katie Simpson.

The ombudsman has identified breaches of the PSNI code of ethics in respect of professional duty, the conduct of police investigators and the duty of supervisors. It has been conf