Two police constables have been dismissed without notice following a police misconduct hearing before an independent panel last week.
Two counts of misconduct and one of gross misconduct were found proven against the first officer at the hearing.
The officer was said to have punched a man who had been detained, after a scuffle broke out whilst officers were attempting to search him.
It was agreed that this was misconduct after the panel ruled the punch was not necessary to gain control of the man and that doing so put him at risk of harm.
On a separate occasion, the officer was involved in the arrest of a man within his home address, which was captured on a body worn camera.
When the officer brought the man into custody, they claimed the arrest had been made outside the address.
The officer also left work to go home without informing or seeking the permission of their supervision.
A second officer faced two allegations, which amounted to two counts of gross misconduct.
The officer was present when a colleague punched a man being detained, but did not challenge or report that excessive force had been used.
They were also asked to carry out cell watch on a vulnerable detainee in police custody, but twice fell asleep.
Names have the officers involved have not been disclosed by Humberside due to concerns regarding safety.
The panel ruled this behaviour put the detainee at risk of harm, falling below the standards expected and breaching standards relating to duties and responsibilities.
Chief Superintendent Judi Heaton, head of Professional Standards Branch, said: “The majority of our workforce are hard-working, dedicated and committed professionals.
“It is important that those who let down the force are held to account and are not able to further damage the reputation of the force and those who work here.”