Humphrey, who was Baltimore's first-round pick in 2017 out of Alabama, was booked in Tuscaloosa County Jail on $2,500 bond.
He allegedly stole a charger valued at $15, according to the police report. The incident occurred Jan. 13 at the Hotel Capstone on Alabama's campus. Humphrey was suspected of using alcohol, according to the report.
"Marlon told us that it was a misunderstanding regarding a $15 telephone charger, which he thought was his. Our understanding is that he has been interviewed by University of Alabama Police and is cooperating. We are monitoring the situation," the Ravens said in a statement.
Humphrey, who was riding an Uber with three women -- one he knew, and two he didn't -- borrowed a phone charger from the driver but refused to give it back when arriving at the hotel, according to the police report.
He then took other cables from the vehicle upon exiting and elbowed the driver in the side after the driver attempted to recover the charger, police said. Humphrey damaged other property when leaving the vehicle and balled up his fist and "acted like he wanted to fight," according to police.
Police found Humphrey inside the hotel and said Humphrey indicated the charger belonged to him. But police noticed the charger didn't fit Humphrey's phone and returned it to the Uber driver, according to the report.
Humphrey posted a tweet at 7:42 a.m. Thursday that read: "Life is good."
Note to all pro players that go to Tuscaloosa to live like your still in college. Grow up please and thank u. #GodWay— Dre Kirkpatrick (@DreKirkSWAG) January 25, 2018
I'm from Alabama so i can say it! Boy, you better stay your ass outta Alabama! Misunderstanding on a phone charger. Graduate and get your ass on! ✌🏿🤷🏿♂️— Lardarius Webb (@LWebb21) January 25, 2018
Humphrey, the No. 16 overall pick last year, looked like he was going to be a top-tier corner in his rookie season. He stepped into the starting lineup after Jimmy Smith suffered a season-ending Achilles injury, and there wasn't much of a drop-off.
The Ravens were impressed with his composure and tight coverage when lined up against the likes of Antonio Brown, T.Y. Hilton and A.J. Green. He finished with two interceptions and 11 passes broken up.