Two people were killed and around six injured in a clash following a dispute over celebrating Holi in a village in Amethi on Friday, police said.
According to the officer, the accused has confessed to the killings and said that he had an affair with the teacher's wife for 18 months which went sour later, leading to him shooting the family.
He accused the BJP of starting a "factory of lies" and using huge cash to lure voters but said he was confident that the people of Amethi won't fall into this trap.
Prior to filing his nomination, Rahul Gandhi held a road show during which he was accompanied by Priyanka Gandhi and her husband Robert Vadra alongwith their children Raihan and Miraya.
Priyanka Gandhi also said farmers were in debt, and about 12,000 of them had committed suicide.
"I will celebrate the milestone in Amethi, where I will be meeting our Congress workers & supporters today," he said.
The Congress chief will also be contesting from Amethi in Uttar Pradesh.
Union minister Smriti Irani on Monday bought a plot of land in Amethi to build a house for herself and, in an apparent dig at Congress leader Rahul Gandhi, said no member of Parliament from here ever made the constituency his house.
'If his health was good he would have become CM again after polls.' 'Those who are with Nitish Babu today will remain with him till the elections to use his name for votes and would definitely play games with him after the polls.'
Lack of organisational network and a strong disconnect with the rural population led to the Congress president's defeat in what until now had been described as a party stronghold.
Sources said Rahul Gandhi is likely to contest from Rae Bareli, but a final call is yet to be taken by the first family of the Congress.
An Independent candidate and three others had on Saturday raised objections over the Congress president's nomination from Amethi.
The ruling party appears to have worked to a plan, beginning with the weaning away of Congress MLC and MLAs.
Leader of Opposition in the Lok Sabha Rahul Gandhi on Friday urged people to refrain from using derogatory language and being nasty towards former Union minister Smriti Irani or any other leader.
'They want to keep the pot boiling all the time.' 'The BJP wants to set a political narrative that the Gandhis are doing wrong things.'
During Emergency Indira Gandhi acquired absolute power. Lakhs of political opponents, students, activists were arrested.
Police did not rule out the possibility of it being a 'political murder'.
26 candidates in Amethi fray take away 60,545 votes; the difference between the victorious Smriti Irani and Rahul Gandhi is 55,120 votes.
"As of now, two accused persons are still absconding and we are tracking them," the DGP said.
Priyanka Gandhi's husband Robert Vadra joined the campaign trail on Monday, taking out a motorcycle rally to drum up support for the Congress in Amethi. Vadra and his daughter arrived in Amethi on Sunday night. He took part in the rally in Gauriganj area on Monday morning and later addressed the electorate in Salon assembly segments of Amethi, which is a Gandhi family pocketborough.
On balance, RG contesting from Raebareli instead of Amethi isn't the masterstroke the party's adherents are touting it to be, but neither is it the blunder the BJP and its tame media is framing it as, points out Prem Panicker.
Without making two-thirds of the country's population a development partner, India's prosperity is impossible, the Congress leader added.
"I do not mind if attacks are made on me but what pains me is that Modiji snatched the food park from Amethi...it was meant to transform Amethi and Raebareli," he said.
Modi was addressing a public rally after laying the foundation stone of a factory to manufacture advanced AK-203 rifles in Amethi, represented by the Congress president in Lok Sabha.
She also tagged a video in which an elderly women is seen alleging that her hand was forcibly put on 'panja' (hand) election symbol of the Congress though she wanted to vote for the 'kamal' (lotus), the BJP's symbol.
100 of the 1,198 candidates are women.
'Rahul is not even a lamp before the sun'
Missing persons posters featuring Rahul Gandhi's image pop up in Amethi.
'Rahul is a seasoned player of politics and chess. He makes his moves after careful consideration.
Union Human Resource Development Minister Smriti Irani has distributed over 15,000 saris among woman from the Amethi Lok Sabha constituency as a Diwali gift.
If Priyanka wins the Lok Sabha bypolls, it would be for the first time that three members of the Gandhi family will be in Parliament. Her mother Sonia Gandhi is a Rajya Sabha member from Rajasthan.
Narendra Modi on Wednesday claimed that the electorate of Amethi has destroyed the pride of Sonia and Rahul Gandhi and forced the latter to go around with folded hands in the constituency, which he would otherwise not visit in five years.
Gandhi is scheduled to visit Amethi from October 4-6.
Rahul Gandhi and Priyanka Gandhi on Sunday held an impressive roadshow in family pocket borough Amethi as a huge crowd chanted slogans praising the Congress vice-president who has been representing the constituency for the past 10 years.
Walking around Amethi barely gives the feel of a VVIP constituency. Could years of neglect cost the Gandhi Parivar its bastion? Sharat Pradhan finds out.
Fielding of candidates in Amethi and Rae Bareli was one of the issues of contention between Congress and Samajwadi Party during their talks to forge the pre-poll alliance.
The district authorities' permission to Rahul Gandhi comes two days after the district magistrate and Superintendent of Police had asked him to reschedule his visit on law and order grounds.
AK-203 assault rifles, with an effective range of 300 meters, are lightweight, robust and easy to use modern assault rifles with proven technology.
Priyanka Gandhi in large part was at the centre of the Congress's action, giving a number of enduring images from this election campaign.
Campaigning continues for the final three phases of the Lok Sabha election.
