From The TimeSplitters Wiki

Police Zombie
Unlocked by	Challenge > 1-C Dusk of the Dead
Species	Zombie
Size	Normal
Accuracy	N/A
Agility	N/A
Stamina	N/A
Fire Proof	N/A
Shock Proof	N/A
Default AI	N/A
Native TimeZone	1965
First Appearance	TS1 Story Mode
Relations	None
Games	TS1

Police Zombie is quite blatantly, a police officer who is a zombie. He only appears in TimeSplitters 1.He also appears in the Mansion level in TS1.

TS1 Gesture	Lunges out of the screen groaning.	TSFP Gesture	N/A
TS2 Gallery	N/A	TSFP Gallery	N/A