The NBC4 I-Team investigated a public health threat that is rampant across Los Angeles. There are 36, 000 homeless people in LA, but most of them don’t have bathrooms or access to the most basic human needs. Joel Grover reports for the NBC4 News at 11 p.m. Tuesday, Feb. 18, 2020.

Lung-related illnesses directly tied to vaping have killed four people in California. In a rare interview, one LA woman tells the NBC4 I-Team she could have met the same fate. Lolita Lopez reports for the NBC4 News at 11 p.m. Thursday, Feb. 20, 2020.

DNA results that used to take days are now available in just a matter of hours. At the district attorney’s office in Orange County, the new technology is making it easier to crack difficult cases. Lolita Lopez reports for the NBC4 News at 11 p.m. Thursday, Feb. 13, 2020.

When a body was found at a mobile home park during the Sandalwood Fire in Calimesa last October, family members of 89-year-old Lois Arvickson feared it was her. They were on the phone with the mother, grandmother and great-grandmother when the line went dead. They searched nearby shelters to see if Arvickson had survived, but couldn’t find her. It...

DNA results that used to take days are now available in just a matter of hours. At the district attorney’s office in Orange County, the new technology is making it easier to crack difficult cases. Lolita Lopez reports for the NBC4 News at 11 p.m. Thursday, Feb. 13, 2020. 

LAPD Chief Michel Moore says some officers have already begun to receive new training on when a person’s name can be added to a statewide police database of gang members, following the NBC4 I-Team report that a group of officers is under investigation for allegedly filing false information that labeled innocent citizens as gang members. Representatives of the California...

The Los Angeles Police Department says it is already re-training officers as to when they’re allowed to label someone as a gang member in a police database. Eric Leonard reports for the NBC4 News on Tuesday, Feb. 10, 2020.

The California Department of Justice said Monday it would use its new authority to oversee the statewide Cal-Gangs database of gang members to audit recent entries from the Los Angeles Police Department, after it was revealed at least 20 LAPD officers were being investigated for allegedly submitting falsified data on innocent pedestrians and motorists. NBC4’s I-Team first reported in January…

More than a year ago, the NBC4 I-Team exposed LA’s trash and rat problem and how it fueled an epidemic of the disease typhus. Our investigative reporter now finds that the problem is as bad as ever, making the City of Angels the City of Trash. Joel Grover reports for the NBC4 News at 11 p.m. Wednesday, Feb. 5, 2020.

“I thought, ‘Why are you coming after my fence when there’s tents blocking the sidewalk illegally?'” one businessowner asked after being threatened with a fine for putting up a fence to keep tents away from his business. Joel Grover reports for the NBC4 News at 11 p.m. Thursday, Jan. 16, 2020.

Some consumers have reached out to the NBC4 I-Team accusing “Optimal Health/Straw Chiropractic” of preying on their declining health – charging them thousands of dollars for treatment they feel is bogus.

A local chiropractic company is accused of using scare tactics and aggressive marketing to dupe patients into a treatment plan that doesn’t work. Carolyn Johnson and the I-Team report for NBC4 News at 4 p.m. on Wednesday, August 14, 2019.

All of the carpets in City Hall and City Hall East may need to be ripped out due to a typhus outbreak in downtown Los Angeles, according to Council President Herb Wesson, who said a city employee possibly contracted the infectious disease while at work.

A $17 million firefighting helicopter damaged during the La Tuna Fire a year ago has been returned to service and the Los Angeles Fire Department says its fleet of aircraft is now fully prepared for the peak of the brush fire season.

$28 million dollars in public works remains unspent by the city of Los Angeles, and now LA’s city comptroller has a new report detailing all the money caught up in red tape. The I-Team’s Lolita Lopez reports for the NBC4 News at 5 p.m. on Tuesday, July 24, 2018.

A man was kicked out of his booked Airbnb rental just days into his stay. Lolita Lopez reports for NBC4 News on Thursday, March 8, 2018.

The subject of the Maywood investigation remains a secret but the NBC4 I-Team found clues that could lead to reasons why it’s happening. Eric Leonard reports for NBC4 News on Thursday, Feb. 8, 2018.

The NBC4 I-Team is investigating reports of water shortages and the challenges firefighters had to face fighting the Thomas Fire. Lolita Lopez reports for the NBC4 News on Friday Dec. 8, 2017.

A Virginia woman was fired after a picture of her giving President Trump’s motorcade the middle finger was posted online. The NBC4 I-Team investigates the rights of citizens who post online. Lolita Lopez reports for the NBC4 News on Wednesday, Nov. 8, 2017.

A West Hollywood woman who said she’s never gotten a parking ticket, finally got one but said she felt she didn’t deserve. Randy Mac reports for NBC4 News on Thursday, Nov. 2, 2017.