Recent PhD chemistry graduate from the University of Southern Florida Xuming Li, 36, was caught by surveillance footage injecting a ‘chemical agent’ into his upstairs neighbor’s doorstep in Tampa

Umar Abdullah, who lives in the home, said he noticed an ‘obnoxious’ smell and he, his wife and baby daughter began vomiting so he planted a camera outside his front door

It caught downstairs neighbor Li with a syringe full of liquid that he injected into a crack in their door

Hazmat investigation revealed a ‘liquid chemical agent’ containing methadone and hydrocodone, both opioid pain medications, had been pervading their home

Inhaling high levels of the narcotics can cause shallow breathing, a weakened pulse, difficulty walking, disorientation, slurred speech, and nausea

Li was arrested on several felony charges, including possession of a controlled dangerous substance and burglary

Victimized family said they were shocked by the revelation because other than noise complaints Li seemed like a ‘regular guy’     

Camera hidden outside their Tampa home caught Xuming Li allegedly in the act of contaminating the Florida family’s doorstep with so much ‘chemical agent’ their baby got sick

A PhD chemistry student has been arrested after he was caught on camera appearing to inject opioids at the doorstep of a neighboring’s home after complaining about the noise coming from the family who lived in the apartment above his own. 
Neighbor from hell Xuming Li, 36, allegedly contaminated the Florida family’s condo with so much ‘chemical agent’ their baby daughter got sick.
He was caught after the neighbor, Umar Abdullah, who was bothered that home where he was residing with his wife and daughter was plagued by an ‘obnoxious smell’, hid a camera in a potted houseplant outside their Tampa home. 

The target of the chemical attack Umar Abdullah [photo], who lives in the Tampa home, a floor beloww Li with his wife and baby daughter, said he was shocked by Li’s behavior because he seemed like a ‘regular guy

the shocking footage captured shows Li loading up a syringe before crouching down and appearing to inject a clear substance, thought to be strong opioid painkillers methadone and hydrocodone, beneath their door.
Abdullah, who lives with his wife and baby daughter, said he was shocked by Li’s behavior because he seemed like a ‘regular guy’. 

The recent PhD chemistry graduate of the Univ. of Southern Florida was caught after his neighbor hid a camera in a potted houseplant outside his home in Tampa. Li was arrested on several felony charges, including possession of a controlled dangerous substance and burglary

Abdullah moved into the Palm Springs Boulevard building with his pregnant wife in June 2022, and they were warmly welcomed by other residents in the building. 
However, he soon began receiving texts from his disgruntled downstairs neighbor, Li, who lamented over losing sleep and hearing the toilet seat move. 
After months of complaints, Abdullah said he, his wife and daughter began feeling sick and dizzy. 
‘I look at my daughter,’ Abdullah told WFLA.
‘Her eyes were full of tears. She was not crying, but her eyes were full of tears.’

Neighbor’s hidden camera caught LI in the act leading to his arrest after injecting noxious chemical into family’s front door

The family were baffled about what was causing their mystery illness, until a friend visited and pointed out an ‘obnoxious’ smell in their home, Abdullah said. 
He began investigating, starting by calling his air conditioning company, who found no issues. 
Abdullah then called a plumber, believing the smell to be coming from his water heater, but that also came out clear. 
His landlord even replaced the heater and had his air ducts and vents cleaned – but the chemical smell persisted. 
Desperate to find out what was plaguing his family, Abdullah even called the fire department, but their tests drew a blank.  

Abdullah’s hidden camera footage showed Yi appearing to take a syringe out, fill it with clear liquid, and inject it into the crack in Abdullah’s door frame

He became increasingly determined to find the source of the smell. ‘I was sniffing the place like a dog,’ he said. 
The sniff test led him to his doorway, where he found a small crack in the corner. 
Only now beginning to suspect some form of tampering had taken place, Abdullah set up a hidden camera in a potted plant outside his door. 

The footage showed Li, wearing casual tracksuit bottoms, crouching and appearing to place something beneath their door

His daughter became sick again, prompting Abdullah to check the footage – and he was shocked by what he saw. 
‘We were shaking,’ he told WFLA. ‘We can’t imagine that he is coming and doing something.’
The footage showed Li, wearing casual tracksuit bottoms, crouching and appearing to place something beneath their door.  
Horrified, Abdullah adjusted the camera angle from door-level to eye level to catch what Li was doing in the moments before. 
This time, his footage appeared to show Li extracting a syringe, filling it with clear liquid, and injecting it into the crack in Abdullah’s door frame. 

The chemical attack suspect Xuming Li [photo], lamented over losing sleep and hearing noise from Abdullah’s apartment 

The terrified father immediately got his family out of the house and called police. 
Tampa Police arrested the PhD student, who was a student at the University of Southern Florida until this summer, and slapped him with several felony charges, including possession of a controlled dangerous substance and burglary. 
His booking page describes him as a 6 foot Asian male weighing 160lb. 
A hazmat investigation revealed a ‘liquid chemical agent’ containing methadone and hydrocodone, both opioid pain medications, had been pervading their home. 
Inhaling high levels of the narcotics can cause shallow breathing, a weakened pulse, difficulty walking, disorientation, slurred speech, and nausea.  

‘We were shaking,’ Abdullah told WFLA. ‘We can’t imagine that he is coming and doing something‘

Li who graduated from the University of Southern Florida in summer 2023 as a PhD chemistry student, was bailed by the court and is scheduled to appear next on December 5. Speaking through a statement issued by his lawyer said Li pled not guilty and all of the facts will come in due course of time.
He is also facing a lawsuit from Abdullah for domestic violence and from the condo association for breach of contract.
His daughter has just celebrated her first birthday at the apartment, but after being emotionally scarred by the experience, Abdullah wants to move his family to a new home.