![A Santa Clara Police officer is shown with blood on his face after apprehending a fan during the second half of an NFL football game between the San Francisco 49ers and the A Santa Clara Police officer is shown with blood on his face after apprehending a fan during the second half of an NFL football game between the San Francisco 49ers and the](https://c8.alamy.com/comp/2MPYDDW/a-santa-clara-police-officer-is-shown-with-blood-on-his-face-after-apprehending-a-fan-during-the-second-half-of-an-nfl-football-game-between-the-san-francisco-49ers-and-the-new-york-giants-in-santa-clara-calif-sunday-nov-12-2017-ap-photoben-margot-2MPYDDW.jpg)
A Santa Clara Police officer is shown with blood on his face after apprehending a fan during the second half of an NFL football game between the San Francisco 49ers and the
![Police Officers Had 'What Appeared to Be Blood' Thrown on Them During Philadelphia Protests, Commissioner Says Police Officers Had 'What Appeared to Be Blood' Thrown on Them During Philadelphia Protests, Commissioner Says](https://d.newsweek.com/en/full/1661328/philadelphia-police.jpg?w=1200&f=31084f5868504c5379767b1c85c0869d)
Police Officers Had 'What Appeared to Be Blood' Thrown on Them During Philadelphia Protests, Commissioner Says
![Santa Maria Police Department on X: "We need your help to save lives! Sign up today to donate blood on June 28th. @VitalantCA is currently facing a critical blood shortage. Patients need Santa Maria Police Department on X: "We need your help to save lives! Sign up today to donate blood on June 28th. @VitalantCA is currently facing a critical blood shortage. Patients need](https://pbs.twimg.com/media/FVzCW1FUEAAfozH.jpg:large)
Santa Maria Police Department on X: "We need your help to save lives! Sign up today to donate blood on June 28th. @VitalantCA is currently facing a critical blood shortage. Patients need
![Blood stains the shirt of an Iraqi Police officer after a police convoy was targeted by a roadside bomb in the southern city of Basra, Iraq Monday, April 18, 2005. Two Iraqi Blood stains the shirt of an Iraqi Police officer after a police convoy was targeted by a roadside bomb in the southern city of Basra, Iraq Monday, April 18, 2005. Two Iraqi](https://c8.alamy.com/comp/2PE80MP/blood-stains-the-shirt-of-an-iraqi-police-officer-after-a-police-convoy-was-targeted-by-a-roadside-bomb-in-the-southern-city-of-basra-iraq-monday-april-18-2005-two-iraqi-policemen-were-killed-and-six-injured-a-police-official-said-ap-photonabil-al-jurani-2PE80MP.jpg)
Blood stains the shirt of an Iraqi Police officer after a police convoy was targeted by a roadside bomb in the southern city of Basra, Iraq Monday, April 18, 2005. Two Iraqi
![World's first: Met Police develops new forensics technology that can detect blood specks within seconds - CityAM World's first: Met Police develops new forensics technology that can detect blood specks within seconds - CityAM](https://www.cityam.com/wp-content/uploads/police-arrest-a-32-year-old-man-over-the-jo-yeates-murder-108193210-5639364b8a130.jpg)