The Independent Office for Police Conduct (IOPC) said three officers had cases to answer. The police watchdog said a fourth officer had been cleared.
The disciplinary hearings will take place in due course and Lancashire Police said “lessons will be learned” from the case.
Assistant Chief Constable Mark Winstanley said: “My thoughts first and foremost are with Kiena’s loved ones.
“I hope that these guilty verdicts give them some sense justice has been done.
“We referred ourselves to the IOPC in July 2022 in relation to contact our officers had with Kiena before her death.
“Their investigation concluded last year and following the conclusion of the criminal proceedings three officers will now face misconduct proceedings.
“It would not be appropriate to comment any further at this point on those proceedings.”
