Here's a round up of our recent arrests and operations to tackle knife and gang crime:
Man jailed for five years for drug offences in Cheshunt- 11 February
A man has been sentenced to five years in prison after being found in possession of Class A drugs in Cheshunt.
Man arrested as police in Welwyn Hatfield tackle cuckooing - 10 February
A man has been arrested as police in Welwyn Hatfield tackle cuckooing – where drug dealers take over the home of a vulnerable person in order to use it as a base for drug dealing.
St Albans drug gang members jailed for over 70 years - 7 February
Ten members of an organised crime group that were involved in a drug supply network in St Albans have been jailed for a combined total of 77 years.
Man sent to prison for cocaine and heroin offences - 10 January
A man has been sent to prison after being found guilty of possession of cocaine and heroin with intent to supply.
Drug gang member jailed for four years- 19 December
A member of a gang that supplied drugs in Hertfordshire has been jailed for 54 months following an investigation into an organised crime group.
Man jailed for firearms and drug offences- 19 December
A man from Northampton was jailed at St Albans Crown Court after pleading guilty to firearms, explosives, drug and money laundering offences.
Early morning warrants executed in North Herts- 12 December
More than 80 officers were involved in the operation which was the culmination of months of investigative activity.
Police working with Welwyn Hatfield Borough Council to tackle cuckooing - 3 December
Police and Welwyn Hatfield Borough Council are urging local residents to spot the signs of cuckooing as they work together to tackle drug dealing and safeguard vulnerable victims.
Local officers visit college to raise awareness of knife crime - 20 November
Students at North Herts College were the latest pupils to receive knife crime advice as part of Stevenage Police’s Operation Edge Awareness programme.
Arrests made in Borehamwood as part of drug investigation - 15 November
Two people were arrested during early morning raids at several addresses in Borehamwood on Wednesday 13 November.
County lines drug dealer jailed for four years- 7 November
A drug dealer who was stopped by police whilst in Watford has been jailed for four years.
Two men charged with conspiracy to deal drugs - 5 November
Two men have been charged with conspiracy to distribute class A drugs as part of an investigation into drug supply networks in Hertfordshire.
Arrests made during county lines gang crime week of action - 30 October
Hertfordshire Constabulary carried out a series of operations as part of a national week of action (7 -11 October) against county lines gang activity.
Arrest made during County Lines gang crime operation - 1 October
Hertfordshire Constabulary carried out a warrant at an address in Hemel Hempstead as part of an ongoing campaign against County Lines drug dealing and gang activity.
Harpenden Colts FC supports Hertfordshire’s #Livesnotknives campaign - 19 September
Harpenden Colts FC is the latest football club to get involved in Hertfordshire Constabulary’s #Livesnotknives campaign.
Hertfordshire to take part in national knife amnesty - 9 September
Hertfordshire Constabulary is joining police forces across the country by taking part in Operation Sceptre, the national knife amnesty.
Man sentenced to 15 years following serious assault in Abbots Langley - 4 September
A man has been sentenced to 15 years in prison today (Wednesday 4 September) after he cut a man’s hand off in Abbots Langley.
Officers challenge local young people to a football tournament - 28 August
Off duty officers from Broxbourne’s Safer Neighbourhood Team challenged local youngsters to play in a mini #livesnotknives football tournament.
Four people jailed for more than 23 years after trail of misery - 27 August
On Wednesday 21 August an organised gang of burglars were jailed for more than 23 years at St Albans Crown Court.
Two arrested after knife and suspected drugs seized- August 19
Two men were arrested after being stopped by officers from Broxbourne’s Operation Scorpion team.
County lines drug dealer sentenced to four years - August 16
A drug dealer who ran a county lines drug network in Hemel Hempstead has been jailed for four and a half years.
Two more people arrested and charged in connection with Hatfield murder - August 15
Two more people have been arrested and charged in connection with the murder of 23 year old Cameron Hill in Hatfield.
Vulnerable young people given VIP treatment at Watford FC - August 14
Watford Football Club invited 40 vulnerable young people to their Premier League match against Brighton at Vicarage Road, on Saturday 10 August.
Twenty one arrested as County Lines gang crime targeted in Stevenage - July 23
Last week (15-19 July) Hertfordshire Constabulary carried out a series of operations as part of a week of action against County Lines gang activity in Stevenage.
Young people invited to event about how gangs ruin lives - July 22
Young people and their parents and guardians from across the county were invited to the latest information evening, organised by Hertfordshire Constabulary’s Children and Young Persons Gangs and Schools Team about the risks of getting involved in gangs.
Pupils support Lives Not Knives campaign in London Colney - July 12
Pupils at London Colney primary schools have been using their artistic talents to capture the harsh reality of knife crime.
Second anti-knife crime ‘Peace Week’ delivered in schools - July 12
Hundreds of students were given the opportunity to learn about the impact and risks of knife crime as part of the second ‘Peace Week’ education scheme organised by police.
Arrests and charges following fortnight of action in Watford - July 8
Seven people were arrested and three warrants were executed during a fortnight of action against gang activity and the supply of drugs in Watford.
Stevenage FC support Hertfordshire’s Lives not Knives campaign - July 5
Stevenage FC players met with the Hertfordshire Constabulary football team on Tuesday 2 July 2019 to back the force’s Lives not Knives campaign.
County Lines drug dealer jailed after investigation - July 3
A dealer who used children to run drugs in Stevenage has been sentenced to more than seven years in prison.
Knife recovered and teenager arrested - June 18
A 17-year-old boy from Stevenage was arrested after officers spotted him behaving suspiciously in the town on Sunday, June 16.
Multi-agency approach to clamp down on knife and drug crime in Three Rivers - May 25
Strong partnership work continues to be the key to tackling knife and drug-related crime in Three Rivers.
Anti-knife crime 'Peace Week' piloted in Watford - May 17
Young people have been learning about the impact and risks of knife crime as part of a ‘Peace Week’ education scheme piloted in Watford for the very first time.
Anti-knife crime poster competition winner announced - May 9
The young winner of an anti-knife crime poster competition was announced earlier this morning (Thursday, May 9).
Man charged in connection with Hitchin murder - April 24
A man has been charged with murder in connection with the death of a 25 year old man from Hitchin.
Cheshunt warrant sees man arrested - April, 8
Officers from the Operation Scorpion team executed a drugs warrant in Cheshunt. A man was arrested on suspicion of possession of drugs with the intent to supply. A number of items suspected to be Class A drugs were seized along with a combat knife.
Man sentenced for string of offences – Watford and Three Rivers - April, 5
Paul Evans has been sentenced to 11 years and one month in prison after pleading guilty to 12 offences including knifepoint robberies, thefts, burglary and handling stolen goods.
Teenager and man sentenced after stabbing in Watford - April, 2
A teenage boy has been sentenced to seven years in prison after stabbing a man in Watford. Hugo Da Silva, aged 17, of Marlborough Road, Watford, appeared before Wood Green Crown Court on Friday, March 29, after being found guilty of Section 18 Grievous Bodily Harm (GBH).
Man jailed for stabbing Good Samaritan - April, 1
On Friday, March 29 a man was sentenced to seven and a half years in prison at Harrow Crown Court after he pleaded guilty to stabbing a man in an unprovoked attack in Cheshunt last year (2018).
Young people told gangs and knives ruin lives - April, 1
A Lives not Knives event held at Hertfordshire University on Tuesday March 26, was the first of many such events planned by Hertfordshire Constabulary’s Children and Young Persons Team, to make young people in Hertfordshire aware of the terrible consequences of getting involved with gangs and violent crime.
Section 60 stop and search powers authorised – Hemel Hempstead - March, 29
Officers in Hemel Hempstead have been granted authorisation to stop and search members of the public suspected to be carrying knives from 3.15pm until 11.59pm today (Friday, March 29), under Section 60 of the Criminal Justice and Public Order Act 1994.
Man charged with serious assault, possession of knife and driving dangerously - March, 25
Edward Stokes has been charged with assault (GBH Section 18), possession of a knife and driving dangerously after he was arrested on Thursday, March 21 in Northern Ireland and brought back to Hertfordshire to face the charges.