Authorities found the body of a 23-year-old man inside a vehicle at 12th and Langley streets in Trainer on Friday.
New Castle County police are looking for 28-year-old Sean Tyler in connection with the crime.
According to authorities, Tyler is wanted on first-degree murder and related charges.
Police said Tyler killed the victim at a home in the 1600 block of Coleman Street in Alban Park, New Castle County.
He's considered armed and dangerous. Anyone with information is asked to call police.