(CNN) -- Federal authorities arrested a man suspected of taking part in a plot to abduct a prosecutor's father on behalf of a prisoner serving a life sentence in North Carolina, the FBI said Monday. 

The FBI's Philadelphia bureau took Jakym Tibbs, 21, into custody early Monday at a residence in Harrisburg, Pennsylvania, FBI spokeswoman Shelley Lynch said. 

He was expected to appear in federal court in Harrisburg later in the day, Lynch said. 

The FBI had offered a $25,000 reward for Tibbs and Quantavious Thompson, 18. Thompson was arrested last Wednesday and is scheduled to be in court later this week. 

"It is too soon to determine whether the reward offered played a role in his capture. The investigation into the kidnapping of Frank Janssen from his home in Wake Forest, North Carolina, is ongoing," Lynch said in a statement. 

Tibbs' apprehension marks the seventh arrest in the April 5 abduction of Janssen. He was rescued by police five days later at an apartment in Atlanta. 

The kidnappers sent demands to Janssen's family "for the benefit" of Kelvin Melton, an inmate at Polk Correctional Institution in Butner, North Carolina, according to an affidavit in support of a search warrant related to criminal complaints against the defendants. 

Janssen's daughter, Colleen Janssen, is an assistant district attorney in Wake County and had prosecuted Melton, officials said. 

Melton is serving a life sentence without parole. 

Authorities said they traced a call to Melton's prison cell, from where he allegedly communicated with the kidnappers. 
Who was arrested?
How old was he?
When was he captured?
How much was the reward?
Who else was arrested?
How old is he?
Was he arrested on Thursday?
Who spoke about the arrests?
What is her job?
How many arrests have there been?
Who was kidnapped?
From where?
In what city?
Where was he found?
How soon?
Does Janssen have a daughter?
Why was Janssen kidnapped?
Is Melton in jail?
Where?
Where is that?
Jakym Tibbs
The FBI's Philadelphia bureau took Jakym Tibbs, 21, into custody early Monday
21
The FBI's Philadelphia bureau took Jakym Tibbs, 21, into custody early Monday
early Monday
The FBI's Philadelphia bureau took Jakym Tibbs, 21, into custody early Monday
$25,000
The FBI had offered a $25,000 reward for Tibbs a
Quantavious Thompson
The FBI had offered a $25,000 reward for Tibbs and Quantavious Thompson, 18.
18
The FBI had offered a $25,000 reward for Tibbs and Quantavious Thompson, 18.
no
Thompson was arrested last Wednesday and is scheduled to be in court later this week. 
Shelley Lynch
The FBI's Philadelphia bureau took Jakym Tibbs, 21, into custody early Monday at a residence in Harrisburg, Pennsylvania, FBI spokeswoman Shelley Lynch said. 
FBI spokeswoman
The FBI's Philadelphia bureau took Jakym Tibbs, 21, into custody early Monday at a residence in Harrisburg, Pennsylvania, FBI spokeswoman Shelley Lynch said. 

seven
Tibbs' apprehension marks the seventh arrest in the April 5 abduction of Janssen. He was rescued by police five days later at an apartment in Atlanta. 
Frank Janssen
The investigation into the kidnapping of Frank Janssen from his home in Wake Forest, North Carolina, is ongoing,
his home
The investigation into the kidnapping of Frank Janssen from his home in Wake Forest, North Carolina, is ongoing,"
Wake Forest, North Carolina
The investigation into the kidnapping of Frank Janssen from his home in Wake Forest, North Carolina, is ongoing,"
Atlanta
He was rescued by police five days later at an apartment in Atlanta. 

five days later
He was rescued by police five days later at an apartment in Atlanta. 
yes
Janssen's daughter, Colleen Janssen, is an assistant district attorney in Wake County
his daughter had prosecuted Melton
Janssen's daughter, Colleen Janssen, is an assistant district attorney in Wake County and had prosecuted Melton, officials said. 
yes
Melton is serving a life sentence without parole. 

Polk Correctional Institution
 Polk Correctional Institution
Butner, North Carolina,
an inmate at Polk Correctional Institution in Butner, North Carolina,