As used in this subchapter:
“Fresh pursuit” includes fresh pursuit as defined by the common law, and also the pursuit of a person who has committed a felony or a misdemeanor or a violation of the Motor Vehicle Code of this State or who is reasonably suspected of having committed a felony or a misdemeanor or a violation of the Motor Vehicle Code of this State, and also includes the pursuit of a person suspected of having committed a supposed felony or misdemeanor or violation of the Motor Vehicle Code of the State though no violation of the law has actually been committed, if there is reasonable grounds for believing that a violation of the law has been committed; however, fresh pursuit as used in this subchapter does not necessarily imply instant pursuit, but pursuit without unreasonable delay.