A suspected serial killer in Tampa, Florida, told police he gave his gun to his boss to keep it away from his little brother.

Florida prosecutors will seek the death penalty against a suspected serial killer in Tampa who is accused of shooting and killing four people.

Howell Emmanuel Donaldson III will return to court next month.

Howell Donaldson III will be arraigned on Dec. 12.

During their court appearance, they are to show cause why they should not be held in civil contempt of court for refusing to answer questions about their 24-year-old son who is suspected in a string of fatal shootings in Tampa, Florida.

A judge will rule on whether they should be held in contempt.

The parents of Howell Donaldson, 24, accused of multiple murders in a Tampa neighborhood, are being called to testify against their son, their lawyer told ABC News.

Rosita and Howell Donaldson Jr. are "heartbroken" for the victims' families.

Police in New York City are investigating if he is connected to unsolved crimes there as well.

The man accused of killing four people in six weeks in Tampa, Florida, will be held without bond until his next court hearing.

Howell Donaldson will be held without bond until his pretrial hearing on Dec. 5.

Police are linking a gun recovered from the suspect to four Florida killings.

The gun the suspect, Howell Donaldson III, 24, gave to a McDonald's coworker to hold is the gun used in all four murders in the Seminole Heights neighborhood, according to police.

Police say Howell Donaldson III will be charged with four counts of first-degree murder in connection to the four killings this October.

A McDonald's bag that Howell Donaldson III handed to his coworker at the fast food restaurant where he worked in Tampa was the key piece of evidence police needed.

Cellphone information and shell casings place suspect Howell Donaldson III at the scenes of a string of recent killings in Tampa, Florida, according to a police affidavit filed a day after his Tuesday arrest.

Howell Donaldson III, 24, will be charged with four counts of first-degree murder in connection with a string of homicides in Tampa's Seminole Heights neighborhood, police said.

Police announced they are charging a man with four recent murders after arresting him at a McDonald's. ABC News' Kendis Gibson reports.

Four people were killed in the same neighborhood between Oct. 9 and Nov. 14.

A reward has risen to $91,000 for information leading to an arrest.

A reward has increased to $91,000 for information leading to an arrest.

Tuesday's fourth homicide follows three unsolved killings that occurred within blocks of one another last month.

Police: "We are treating it as though it is related until we rule otherwise."

A body was found by police after shots were heard in the same Tampa neighborhood where three people were killed over the span of 11 days.

Authorities have identified the victim as Ronald Felton, 60, who was supposed to "meet up with someone" when he was apparently targeted and slain in cold blood, Tampa Police Chief Brian Dugan said.

Tampa police, responding to early-morning reports of gunfire, found a gunshot victim in the same Seminole Heights neighborhood where three people died in a span of 11 days last month, authorities said.

Police in Tampa are planning a massive show of force on Halloween as they search for a person of interest in three killings that occurred within a half-mile of each other within 10 days.

Mayor and police chief to trick-or-treat with the community in Seminole Heights.

Someone responsible for three murders in 11 days is still on the loose in Florida; surveillance shows a person of interest running away from where the first murder took place.

The video is at times in color and is captured from various angles.

"I carry throughout the house, now," Ron Davis, a Tampa, Florida, resident told ABC News' Victor Oquendo.

Police are trying to calm anxious residents after three murders in two weeks.

Monica Hoffa was gunned down by a suspected serial killer earlier this month.

Tampa authorities are examining surveillance video for clues after three people were shot and killed in 10 days within less than a half a mile of each other.

Police are saying the murders are connected and are looking for a person of interest seen near the scene of the first murder.

Police are searching for whoever is "terrorizing" a Tampa neighborhood after three people were shot and killed in the same vicinity in less than two weeks.

Police say someone has gunned down three people within the last two weeks in the Seminole Heights neighborhood of Tampa.

The victims were all alone and vulnerable at the time they were attacked.